http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionServerAccounting.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionServerAccounting.java
 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionServerAccounting.java
index 7689fcd..1c627f7 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionServerAccounting.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionServerAccounting.java
@@ -31,17 +31,17 @@ import org.apache.hadoop.hbase.util.Pair;
 
 /**
  * RegionServerAccounting keeps record of some basic real time information 
about
- * the Region Server. Currently, it keeps record the global memstore size and 
global memstore heap
- * overhead. It also tracks the replay edits per region.
+ * the Region Server. Currently, it keeps record the global memstore size and 
global memstore
+ * on-heap and off-heap overhead. It also tracks the replay edits per region.
  */
 @InterfaceAudience.Private
 public class RegionServerAccounting {
   // memstore data size
-  private final LongAdder globalMemstoreDataSize = new LongAdder();
-  // memstore heap size. When off heap MSLAB in place, this will be only heap 
overhead of the Cell
-  // POJOs and entry overhead of them onto memstore. When on heap MSLAB, this 
will be include heap
-  // overhead as well as the cell data size. Ya cell data is in on heap area 
only then.
-  private final LongAdder globalMemstoreHeapSize = new LongAdder();
+  private final LongAdder globalMemStoreDataSize = new LongAdder();
+  // memstore heap size.
+  private final LongAdder globalMemStoreHeapSize = new LongAdder();
+  // memstore off-heap size.
+  private final LongAdder globalMemStoreOffHeapSize = new LongAdder();
 
   // Store the edits size during replaying WAL. Use this to roll back the
   // global memstore size once a region opening failed.
@@ -114,14 +114,21 @@ public class RegionServerAccounting {
    * @return the global Memstore data size in the RegionServer
    */
   public long getGlobalMemStoreDataSize() {
-    return globalMemstoreDataSize.sum();
+    return globalMemStoreDataSize.sum();
   }
 
   /**
    * @return the global memstore heap size in the RegionServer
    */
   public long getGlobalMemStoreHeapSize() {
-    return this.globalMemstoreHeapSize.sum();
+    return this.globalMemStoreHeapSize.sum();
+  }
+
+  /**
+   * @return the global memstore heap size in the RegionServer
+   */
+  public long getGlobalMemStoreOffHeapSize() {
+    return this.globalMemStoreOffHeapSize.sum();
   }
 
   /**
@@ -129,13 +136,15 @@ public class RegionServerAccounting {
    *        the global Memstore size
    */
   public void incGlobalMemStoreSize(MemStoreSize memStoreSize) {
-    globalMemstoreDataSize.add(memStoreSize.getDataSize());
-    globalMemstoreHeapSize.add(memStoreSize.getHeapSize());
+    globalMemStoreDataSize.add(memStoreSize.getDataSize());
+    globalMemStoreHeapSize.add(memStoreSize.getHeapSize());
+    globalMemStoreOffHeapSize.add(memStoreSize.getOffHeapSize());
   }
 
   public void decGlobalMemStoreSize(MemStoreSize memStoreSize) {
-    globalMemstoreDataSize.add(-memStoreSize.getDataSize());
-    globalMemstoreHeapSize.add(-memStoreSize.getHeapSize());
+    globalMemStoreDataSize.add(-memStoreSize.getDataSize());
+    globalMemStoreHeapSize.add(-memStoreSize.getHeapSize());
+    globalMemStoreOffHeapSize.add(-memStoreSize.getOffHeapSize());
   }
 
   /**
@@ -151,13 +160,13 @@ public class RegionServerAccounting {
       }
     } else {
       // If the configured memstore is offheap, check for two things
-      // 1) If the global memstore data size is greater than the configured
+      // 1) If the global memstore off-heap size is greater than the configured
       // 'hbase.regionserver.offheap.global.memstore.size'
       // 2) If the global memstore heap size is greater than the configured 
onheap
       // global memstore limit 'hbase.regionserver.global.memstore.size'.
       // We do this to avoid OOME incase of scenarios where the heap is 
occupied with
       // lot of onheap references to the cells in memstore
-      if (getGlobalMemStoreDataSize() >= globalMemStoreLimit) {
+      if (getGlobalMemStoreOffHeapSize() >= globalMemStoreLimit) {
         // Indicates that global memstore size is above the configured
         // 'hbase.regionserver.offheap.global.memstore.size'
         return FlushType.ABOVE_OFFHEAP_HIGHER_MARK;
@@ -181,8 +190,8 @@ public class RegionServerAccounting {
         return FlushType.ABOVE_ONHEAP_LOWER_MARK;
       }
     } else {
-      if (getGlobalMemStoreDataSize() >= globalMemStoreLimitLowMark) {
-        // Indicates that the offheap memstore's data size is greater than the 
global memstore
+      if (getGlobalMemStoreOffHeapSize() >= globalMemStoreLimitLowMark) {
+        // Indicates that the offheap memstore's size is greater than the 
global memstore
         // lower limit
         return FlushType.ABOVE_OFFHEAP_LOWER_MARK;
       } else if (getGlobalMemStoreHeapSize() >= 
globalOnHeapMemstoreLimitLowMark) {
@@ -203,7 +212,7 @@ public class RegionServerAccounting {
     if (memType == MemoryType.HEAP) {
       return (getGlobalMemStoreHeapSize()) * 1.0 / globalMemStoreLimitLowMark;
     } else {
-      return Math.max(getGlobalMemStoreDataSize() * 1.0 / 
globalMemStoreLimitLowMark,
+      return Math.max(getGlobalMemStoreOffHeapSize() * 1.0 / 
globalMemStoreLimitLowMark,
           getGlobalMemStoreHeapSize() * 1.0 / 
globalOnHeapMemstoreLimitLowMark);
     }
   }

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionServicesForStores.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionServicesForStores.java
 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionServicesForStores.java
index a1f5755..5b98a27 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionServicesForStores.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionServicesForStores.java
@@ -66,7 +66,7 @@ public class RegionServicesForStores {
   }
 
   public void addMemStoreSize(MemStoreSize size) {
-    region.addAndGetMemStoreSize(size);
+    region.incMemStoreSize(size);
   }
 
   public RegionInfo getRegionInfo() {
@@ -89,6 +89,6 @@ public class RegionServicesForStores {
 
   @VisibleForTesting
   long getMemStoreSize() {
-    return region.getMemStoreSize();
+    return region.getMemStoreDataSize();
   }
 }

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Segment.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Segment.java 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Segment.java
index 5bfab52..66a2ad5 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Segment.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Segment.java
@@ -23,7 +23,6 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Objects;
 import java.util.SortedSet;
-import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.atomic.AtomicReference;
 
 import org.apache.hadoop.hbase.Cell;
@@ -48,9 +47,9 @@ import 
org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesti
 @InterfaceAudience.Private
 public abstract class Segment {
 
-  public final static long FIXED_OVERHEAD = 
ClassSize.align((long)ClassSize.OBJECT
-      + 6 * ClassSize.REFERENCE // cellSet, comparator, memStoreLAB, dataSize,
-                                // heapSize, and timeRangeTracker
+  public final static long FIXED_OVERHEAD = ClassSize.align(ClassSize.OBJECT
+      + 5 * ClassSize.REFERENCE // cellSet, comparator, memStoreLAB, 
memStoreSizing,
+                                // and timeRangeTracker
       + Bytes.SIZEOF_LONG // minSequenceId
       + Bytes.SIZEOF_BOOLEAN); // tagsPresent
   public final static long DEEP_OVERHEAD = FIXED_OVERHEAD + 
ClassSize.ATOMIC_REFERENCE
@@ -62,8 +61,7 @@ public abstract class Segment {
   private MemStoreLAB memStoreLAB;
   // Sum of sizes of all Cells added to this Segment. Cell's heapSize is 
considered. This is not
   // including the heap overhead of this class.
-  protected final AtomicLong dataSize;
-  protected final AtomicLong heapSize;
+  protected final MemStoreSizing segmentSize;
   protected final TimeRangeTracker timeRangeTracker;
   protected volatile boolean tagsPresent;
 
@@ -71,8 +69,23 @@ public abstract class Segment {
   // and there is no need in true Segments state
   protected Segment(CellComparator comparator, TimeRangeTracker trt) {
     this.comparator = comparator;
-    this.dataSize = new AtomicLong(0);
-    this.heapSize = new AtomicLong(0);
+    this.segmentSize = new MemStoreSizing();
+    this.timeRangeTracker = trt;
+  }
+
+  protected Segment(CellComparator comparator, List<ImmutableSegment> segments,
+      TimeRangeTracker trt) {
+    long dataSize = 0;
+    long heapSize = 0;
+    long OffHeapSize = 0;
+    for (Segment segment : segments) {
+      MemStoreSize memStoreSize = segment.getMemStoreSize();
+      dataSize += memStoreSize.getDataSize();
+      heapSize += memStoreSize.getHeapSize();
+      OffHeapSize += memStoreSize.getOffHeapSize();
+    }
+    this.comparator = comparator;
+    this.segmentSize = new MemStoreSizing(dataSize, heapSize, OffHeapSize);
     this.timeRangeTracker = trt;
   }
 
@@ -82,8 +95,7 @@ public abstract class Segment {
     this.comparator = comparator;
     this.minSequenceId = Long.MAX_VALUE;
     this.memStoreLAB = memStoreLAB;
-    this.dataSize = new AtomicLong(0);
-    this.heapSize = new AtomicLong(0);
+    this.segmentSize = new MemStoreSizing();
     this.tagsPresent = false;
     this.timeRangeTracker = trt;
   }
@@ -93,8 +105,7 @@ public abstract class Segment {
     this.comparator = segment.getComparator();
     this.minSequenceId = segment.getMinSequenceId();
     this.memStoreLAB = segment.getMemStoreLAB();
-    this.dataSize = new AtomicLong(segment.keySize());
-    this.heapSize = new AtomicLong(segment.heapSize.get());
+    this.segmentSize = new MemStoreSizing(segment.getMemStoreSize());
     this.tagsPresent = segment.isTagsPresent();
     this.timeRangeTracker = segment.getTimeRangeTracker();
   }
@@ -134,17 +145,6 @@ public abstract class Segment {
   }
 
   /**
-   * @return the first cell in the segment that has equal or greater key than 
the given cell
-   */
-  public Cell getFirstAfter(Cell cell) {
-    SortedSet<Cell> snTailSet = tailSet(cell);
-    if (!snTailSet.isEmpty()) {
-      return snTailSet.first();
-    }
-    return null;
-  }
-
-  /**
    * Closing a segment before it is being discarded
    */
   public void close() {
@@ -221,27 +221,39 @@ public abstract class Segment {
     return this;
   }
 
+  public MemStoreSize getMemStoreSize() {
+    return this.segmentSize;
+  }
+
   /**
    * @return Sum of all cell's size.
    */
   public long keySize() {
-    return this.dataSize.get();
+    return this.segmentSize.getDataSize();
   }
 
   /**
    * @return The heap size of this segment.
    */
   public long heapSize() {
-    return this.heapSize.get();
+    return this.segmentSize.getHeapSize();
+  }
+
+  /**
+   * @return The off-heap size of this segment.
+   */
+  public long offHeapSize() {
+    return this.segmentSize.getOffHeapSize();
   }
 
   /**
    * Updates the size counters of the segment by the given delta
    */
   //TODO
-  protected void incSize(long delta, long heapOverhead) {
-    this.dataSize.addAndGet(delta);
-    this.heapSize.addAndGet(heapOverhead);
+  protected void incSize(long delta, long heapOverhead, long offHeapOverhead) {
+    synchronized (this) {
+      this.segmentSize.incMemStoreSize(delta, heapOverhead, offHeapOverhead);
+    }
   }
 
   public long getMinSequenceId() {
@@ -303,9 +315,10 @@ public abstract class Segment {
       cellSize = getCellLength(cellToAdd);
     }
     long heapSize = heapSizeChange(cellToAdd, succ);
-    incSize(cellSize, heapSize);
+    long offHeapSize = offHeapSizeChange(cellToAdd, succ);
+    incSize(cellSize, heapSize, offHeapSize);
     if (memstoreSizing != null) {
-      memstoreSizing.incMemStoreSize(cellSize, heapSize);
+      memstoreSizing.incMemStoreSize(cellSize, heapSize, offHeapSize);
     }
     getTimeRangeTracker().includeTimestamp(cellToAdd);
     minSequenceId = Math.min(minSequenceId, cellToAdd.getSequenceId());
@@ -327,10 +340,48 @@ public abstract class Segment {
    *         heap size itself and additional overhead because of addition on 
to CSLM.
    */
   protected long heapSizeChange(Cell cell, boolean succ) {
+    long res = 0;
     if (succ) {
-      return ClassSize
-          .align(indexEntrySize() + PrivateCellUtil.estimatedHeapSizeOf(cell));
+      boolean onHeap = true;
+      MemStoreLAB memStoreLAB = getMemStoreLAB();
+      if(memStoreLAB != null) {
+        onHeap = memStoreLAB.isOnHeap();
+      }
+      res += indexEntryOnHeapSize(onHeap);
+      if(onHeap) {
+        res += PrivateCellUtil.estimatedSizeOfCell(cell);
+      }
+      res = ClassSize.align(res);
     }
+    return res;
+  }
+
+  protected long offHeapSizeChange(Cell cell, boolean succ) {
+    long res = 0;
+    if (succ) {
+      boolean offHeap = false;
+      MemStoreLAB memStoreLAB = getMemStoreLAB();
+      if(memStoreLAB != null) {
+        offHeap = memStoreLAB.isOffHeap();
+      }
+      res += indexEntryOffHeapSize(offHeap);
+      if(offHeap) {
+        res += PrivateCellUtil.estimatedSizeOfCell(cell);
+      }
+      res = ClassSize.align(res);
+    }
+    return res;
+  }
+
+  protected long indexEntryOnHeapSize(boolean onHeap) {
+    // in most cases index is allocated on-heap
+    // override this method when it is not always the case, e.g., in CCM
+    return indexEntrySize();
+  }
+
+  protected long indexEntryOffHeapSize(boolean offHeap) {
+    // in most cases index is allocated on-heap
+    // override this method when it is not always the case, e.g., in CCM
     return 0;
   }
 

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
index 0b9b547..1624810 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
@@ -600,7 +600,7 @@ public class StoreScanner extends 
NonReversedNonLazyKeyValueScanner
 
             // Update the progress of the scanner context
             scannerContext.incrementSizeProgress(cellSize,
-              PrivateCellUtil.estimatedHeapSizeOf(cell));
+              PrivateCellUtil.estimatedSizeOfCell(cell));
             scannerContext.incrementBatchProgress(1);
 
             if (matcher.isUserScan() && totalBytesRead > maxRowSize) {

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALEdit.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALEdit.java 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALEdit.java
index e7c7caf..1d4dc1b 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALEdit.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALEdit.java
@@ -168,7 +168,7 @@ public class WALEdit implements HeapSize {
   public long heapSize() {
     long ret = ClassSize.ARRAYLIST;
     for (Cell cell : cells) {
-      ret += PrivateCellUtil.estimatedHeapSizeOf(cell);
+      ret += PrivateCellUtil.estimatedSizeOfCell(cell);
     }
     return ret;
   }

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/TestGlobalMemStoreSize.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestGlobalMemStoreSize.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestGlobalMemStoreSize.java
index f66a828..2e2d978 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestGlobalMemStoreSize.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestGlobalMemStoreSize.java
@@ -99,7 +99,7 @@ public class TestGlobalMemStoreSize {
       long globalMemStoreSize = 0;
       for (RegionInfo regionInfo :
           ProtobufUtil.getOnlineRegions(null, server.getRSRpcServices())) {
-        globalMemStoreSize += 
server.getRegion(regionInfo.getEncodedName()).getMemStoreSize();
+        globalMemStoreSize += 
server.getRegion(regionInfo.getEncodedName()).getMemStoreDataSize();
       }
       
assertEquals(server.getRegionServerAccounting().getGlobalMemStoreDataSize(),
         globalMemStoreSize);
@@ -130,7 +130,7 @@ public class TestGlobalMemStoreSize {
         for (RegionInfo regionInfo :
             ProtobufUtil.getOnlineRegions(null, server.getRSRpcServices())) {
           HRegion r = server.getRegion(regionInfo.getEncodedName());
-          long l = r.getMemStoreSize();
+          long l = r.getMemStoreDataSize();
           if (l > 0) {
             // Only meta could have edits at this stage.  Give it another flush
             // clear them.

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java
index 3038744..965243f 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java
@@ -391,7 +391,7 @@ public class TestPartialResultsFromClientSide {
       // Estimate the cell heap size. One difference is that on server side, 
the KV Heap size is
       // estimated differently in case the cell is backed up by MSLAB byte[] 
(no overhead for
       // backing array). Thus below calculation is a bit brittle.
-      CELL_HEAP_SIZE = 
PrivateCellUtil.estimatedHeapSizeOf(result.rawCells()[0])
+      CELL_HEAP_SIZE = 
PrivateCellUtil.estimatedSizeOfCell(result.rawCells()[0])
           - (ClassSize.ARRAY+3);
       if (LOG.isInfoEnabled()) LOG.info("Cell heap size: " + CELL_HEAP_SIZE);
       scanner.close();

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/TestServerSideScanMetricsFromClientSide.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestServerSideScanMetricsFromClientSide.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestServerSideScanMetricsFromClientSide.java
index 162be35..5a3ba82 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestServerSideScanMetricsFromClientSide.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestServerSideScanMetricsFromClientSide.java
@@ -32,7 +32,6 @@ import org.apache.hadoop.hbase.client.metrics.ScanMetrics;
 import org.apache.hadoop.hbase.client.metrics.ServerSideScanMetrics;
 import org.apache.hadoop.hbase.filter.BinaryComparator;
 import org.apache.hadoop.hbase.filter.ColumnPrefixFilter;
-import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
 import org.apache.hadoop.hbase.filter.Filter;
 import org.apache.hadoop.hbase.filter.FilterList;
 import org.apache.hadoop.hbase.filter.FilterList.Operator;
@@ -156,7 +155,7 @@ public class TestServerSideScanMetricsFromClientSide {
       assertTrue(result.rawCells() != null);
       assertTrue(result.rawCells().length == 1);
 
-      CELL_HEAP_SIZE = 
PrivateCellUtil.estimatedHeapSizeOf(result.rawCells()[0]);
+      CELL_HEAP_SIZE = 
PrivateCellUtil.estimatedSizeOfCell(result.rawCells()[0]);
       scanner.close();
     }
 

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAsyncRegionAdminApi.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAsyncRegionAdminApi.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAsyncRegionAdminApi.java
index fbb87bb..762dbd1 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAsyncRegionAdminApi.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAsyncRegionAdminApi.java
@@ -215,30 +215,30 @@ public class TestAsyncRegionAdminApi extends 
TestAsyncAdminBase {
     ASYNC_CONN.getTable(tableName)
         .put(new Put(hri.getStartKey()).addColumn(FAMILY, FAMILY_0, 
Bytes.toBytes("value-1")))
         .join();
-    
assertTrue(regionServer.getOnlineRegion(hri.getRegionName()).getMemStoreSize() 
> 0);
+    
assertTrue(regionServer.getOnlineRegion(hri.getRegionName()).getMemStoreDataSize()
 > 0);
     // flush region and wait flush operation finished.
     LOG.info("flushing region: " + Bytes.toStringBinary(hri.getRegionName()));
     admin.flushRegion(hri.getRegionName()).get();
     LOG.info("blocking until flush is complete: " + 
Bytes.toStringBinary(hri.getRegionName()));
     Threads.sleepWithoutInterrupt(500);
-    while (regionServer.getOnlineRegion(hri.getRegionName()).getMemStoreSize() 
> 0) {
+    while 
(regionServer.getOnlineRegion(hri.getRegionName()).getMemStoreDataSize() > 0) {
       Threads.sleep(50);
     }
     // check the memstore.
-    assertEquals(0, 
regionServer.getOnlineRegion(hri.getRegionName()).getMemStoreSize());
+    
assertEquals(regionServer.getOnlineRegion(hri.getRegionName()).getMemStoreDataSize(),
 0);
 
     // write another put into the specific region
     ASYNC_CONN.getTable(tableName)
         .put(new Put(hri.getStartKey()).addColumn(FAMILY, FAMILY_0, 
Bytes.toBytes("value-2")))
         .join();
-    
assertTrue(regionServer.getOnlineRegion(hri.getRegionName()).getMemStoreSize() 
> 0);
+    
assertTrue(regionServer.getOnlineRegion(hri.getRegionName()).getMemStoreDataSize()
 > 0);
     admin.flush(tableName).get();
     Threads.sleepWithoutInterrupt(500);
-    while (regionServer.getOnlineRegion(hri.getRegionName()).getMemStoreSize() 
> 0) {
+    while 
(regionServer.getOnlineRegion(hri.getRegionName()).getMemStoreDataSize() > 0) {
       Threads.sleep(50);
     }
     // check the memstore.
-    assertEquals(0, 
regionServer.getOnlineRegion(hri.getRegionName()).getMemStoreSize());
+    
assertEquals(regionServer.getOnlineRegion(hri.getRegionName()).getMemStoreDataSize(),
 0);
   }
 
   private void waitUntilMobCompactionFinished(TableName tableName)

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientPushback.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientPushback.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientPushback.java
index 48d9a93..d6f32f5 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientPushback.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientPushback.java
@@ -36,9 +36,7 @@ import 
org.apache.hadoop.hbase.client.backoff.ClientBackoffPolicy;
 import org.apache.hadoop.hbase.client.backoff.ExponentialClientBackoffPolicy;
 import org.apache.hadoop.hbase.client.backoff.ServerStatistics;
 import org.apache.hadoop.hbase.client.coprocessor.Batch;
-import org.apache.hadoop.hbase.regionserver.HRegion;
 import org.apache.hadoop.hbase.regionserver.HRegionServer;
-import org.apache.hadoop.hbase.regionserver.MemStoreSize;
 import org.apache.hadoop.hbase.regionserver.Region;
 import org.apache.hadoop.hbase.testclassification.MediumTests;
 import org.apache.hadoop.hbase.util.Bytes;
@@ -67,7 +65,7 @@ public class TestClientPushback {
   private static final TableName tableName = 
TableName.valueOf("client-pushback");
   private static final byte[] family = Bytes.toBytes("f");
   private static final byte[] qualifier = Bytes.toBytes("q");
-  private static final long flushSizeBytes = 256;
+  private static final long flushSizeBytes = 512;
 
   @BeforeClass
   public static void setupCluster() throws Exception{
@@ -110,7 +108,7 @@ public class TestClientPushback {
     mutator.flush();
 
     // get the current load on RS. Hopefully memstore isn't flushed since we 
wrote the the data
-    int load = (int) ((((HRegion) region).addAndGetMemStoreSize(new 
MemStoreSize(0, 0)) * 100)
+    int load = (int) ((region.getMemStoreHeapSize() * 100)
         / flushSizeBytes);
     LOG.debug("Done writing some data to "+tableName);
 

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFlushFromClient.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFlushFromClient.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFlushFromClient.java
index dc3f8da..207e1fc 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFlushFromClient.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFlushFromClient.java
@@ -93,7 +93,7 @@ public class TestFlushFromClient {
       t.put(puts);
     }
     assertFalse(getRegionInfo().isEmpty());
-    assertTrue(getRegionInfo().stream().allMatch(r -> r.getMemStoreSize() != 
0));
+    assertTrue(getRegionInfo().stream().allMatch(r -> r.getMemStoreDataSize() 
!= 0));
   }
 
   @After
@@ -108,7 +108,7 @@ public class TestFlushFromClient {
   public void testFlushTable() throws Exception {
     try (Admin admin = TEST_UTIL.getAdmin()) {
       admin.flush(tableName);
-      assertFalse(getRegionInfo().stream().anyMatch(r -> r.getMemStoreSize() 
!= 0));
+      assertFalse(getRegionInfo().stream().anyMatch(r -> 
r.getMemStoreDataSize() != 0));
     }
   }
 
@@ -116,7 +116,7 @@ public class TestFlushFromClient {
   public void testAsyncFlushTable() throws Exception {
     AsyncAdmin admin = asyncConn.getAdmin();
     admin.flush(tableName).get();
-    assertFalse(getRegionInfo().stream().anyMatch(r -> r.getMemStoreSize() != 
0));
+    assertFalse(getRegionInfo().stream().anyMatch(r -> r.getMemStoreDataSize() 
!= 0));
   }
 
   @Test
@@ -125,7 +125,7 @@ public class TestFlushFromClient {
       for (HRegion r : getRegionInfo()) {
         admin.flushRegion(r.getRegionInfo().getRegionName());
         TimeUnit.SECONDS.sleep(1);
-        assertEquals(0, r.getMemStoreSize());
+        assertEquals(0, r.getMemStoreDataSize());
       }
     }
   }
@@ -136,7 +136,7 @@ public class TestFlushFromClient {
     for (HRegion r : getRegionInfo()) {
       admin.flushRegion(r.getRegionInfo().getRegionName()).get();
       TimeUnit.SECONDS.sleep(1);
-      assertEquals(0, r.getMemStoreSize());
+      assertEquals(0, r.getMemStoreDataSize());
     }
   }
 
@@ -148,7 +148,7 @@ public class TestFlushFromClient {
             .stream().map(JVMClusterUtil.RegionServerThread::getRegionServer)
             .collect(Collectors.toList())) {
         admin.flushRegionServer(rs.getServerName());
-        assertFalse(getRegionInfo(rs).stream().anyMatch(r -> 
r.getMemStoreSize() != 0));
+        assertFalse(getRegionInfo(rs).stream().anyMatch(r -> 
r.getMemStoreDataSize() != 0));
       }
     }
   }
@@ -161,7 +161,7 @@ public class TestFlushFromClient {
       .stream().map(JVMClusterUtil.RegionServerThread::getRegionServer)
       .collect(Collectors.toList())) {
       admin.flushRegionServer(rs.getServerName()).get();
-      assertFalse(getRegionInfo(rs).stream().anyMatch(r -> r.getMemStoreSize() 
!= 0));
+      assertFalse(getRegionInfo(rs).stream().anyMatch(r -> 
r.getMemStoreDataSize() != 0));
     }
   }
 

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSizeFailures.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSizeFailures.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSizeFailures.java
index a336274..cadce8a 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSizeFailures.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSizeFailures.java
@@ -53,7 +53,7 @@ public class TestSizeFailures {
   private static byte [] FAMILY = Bytes.toBytes("testFamily");
   protected static int SLAVES = 1;
   private static TableName TABLENAME;
-  private static final int NUM_ROWS = 1000 * 1000, NUM_COLS = 10;
+  private static final int NUM_ROWS = 1000 * 1000, NUM_COLS = 9;
 
   @BeforeClass
   public static void setUpBeforeClass() throws Exception {
@@ -129,7 +129,7 @@ public class TestSizeFailures {
       long rowsObserved = entry.getKey();
       long entriesObserved = entry.getValue();
 
-      // Verify that we see 1M rows and 10M cells
+      // Verify that we see 1M rows and 9M cells
       assertEquals(NUM_ROWS, rowsObserved);
       assertEquals(NUM_ROWS * NUM_COLS, entriesObserved);
     }
@@ -152,7 +152,7 @@ public class TestSizeFailures {
       long rowsObserved = entry.getKey();
       long entriesObserved = entry.getValue();
 
-      // Verify that we see 1M rows and 10M cells
+      // Verify that we see 1M rows and 9M cells
       assertEquals(NUM_ROWS, rowsObserved);
       assertEquals(NUM_ROWS * NUM_COLS, entriesObserved);
     }

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestNegativeMemStoreSizeWithSlowCoprocessor.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestNegativeMemStoreSizeWithSlowCoprocessor.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestNegativeMemStoreSizeWithSlowCoprocessor.java
index 336d342..4a92d4c 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestNegativeMemStoreSizeWithSlowCoprocessor.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestNegativeMemStoreSizeWithSlowCoprocessor.java
@@ -27,7 +27,6 @@ import org.apache.hadoop.hbase.client.Durability;
 import org.apache.hadoop.hbase.client.Put;
 import org.apache.hadoop.hbase.client.Table;
 import org.apache.hadoop.hbase.regionserver.HRegion;
-import org.apache.hadoop.hbase.regionserver.MemStoreSize;
 import org.apache.hadoop.hbase.testclassification.LargeTests;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.wal.WALEdit;
@@ -111,7 +110,7 @@ public class TestNegativeMemStoreSizeWithSlowCoprocessor {
 
       if (Bytes.equals(put.getRow(), Bytes.toBytes("row2"))) {
         region.flush(false);
-        Assert.assertTrue(region.addAndGetMemStoreSize(new MemStoreSize()) >= 
0);
+        Assert.assertTrue(region.getMemStoreDataSize() >= 0);
       }
     }
   }

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingMemStore.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingMemStore.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingMemStore.java
index d68191c..505c2f0 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingMemStore.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingMemStore.java
@@ -699,7 +699,7 @@ public class TestCompactingMemStore extends 
TestDefaultMemStore {
     int totalCellsLen1 = addRowsByKeys(memstore, keys1);// Adding 4 cells.
     int oneCellOnCSLMHeapSize = 120;
     int oneCellOnCAHeapSize = 88;
-    assertEquals(totalCellsLen1, region.getMemStoreSize());
+    assertEquals(totalCellsLen1, region.getMemStoreDataSize());
     long totalHeapSize = MutableSegment.DEEP_OVERHEAD + 4 * 
oneCellOnCSLMHeapSize;
     assertEquals(totalHeapSize, ((CompactingMemStore)memstore).heapSize());
     ((CompactingMemStore)memstore).flushInMemory(); // push keys to pipeline 
and compact
@@ -780,7 +780,7 @@ public class TestCompactingMemStore extends 
TestDefaultMemStore {
 
     int totalCellsLen1 = addRowsByKeys(memstore, keys1);// Adding 3 cells.
     int oneCellOnCSLMHeapSize = 120;
-    assertEquals(totalCellsLen1, region.getMemStoreSize());
+    assertEquals(totalCellsLen1, region.getMemStoreDataSize());
     long totalHeapSize = MutableSegment.DEEP_OVERHEAD + 3 * 
oneCellOnCSLMHeapSize;
     assertEquals(totalHeapSize, memstore.heapSize());
 
@@ -838,7 +838,7 @@ public class TestCompactingMemStore extends 
TestDefaultMemStore {
       LOG.debug("added kv: " + kv.getKeyString() + ", timestamp:" + 
kv.getTimestamp());
     }
     regionServicesForStores.addMemStoreSize(new 
MemStoreSize(hmc.getActive().keySize() - size,
-        hmc.getActive().heapSize() - heapOverhead));
+        hmc.getActive().heapSize() - heapOverhead, 0));
     return totalLen;
   }
 
@@ -859,7 +859,7 @@ public class TestCompactingMemStore extends 
TestDefaultMemStore {
       LOG.debug("added kv: " + kv.getKeyString() + ", timestamp:" + 
kv.getTimestamp());
     }
     regionServicesForStores.addMemStoreSize(new 
MemStoreSize(hmc.getActive().keySize() - size,
-            hmc.getActive().heapSize() - heapOverhead));
+            hmc.getActive().heapSize() - heapOverhead, 0));
     return totalLen;
   }
 

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingToCellFlatMapMemStore.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingToCellFlatMapMemStore.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingToCellFlatMapMemStore.java
index a8561de..12b078a 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingToCellFlatMapMemStore.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingToCellFlatMapMemStore.java
@@ -221,7 +221,7 @@ public class TestCompactingToCellFlatMapMemStore extends 
TestCompactingMemStore
     long cellBeforeFlushSize = cellBeforeFlushSize();
     long cellAfterFlushSize = cellAfterFlushSize();
     long totalHeapSize1 = MutableSegment.DEEP_OVERHEAD + 4 * 
cellBeforeFlushSize;
-    assertEquals(totalCellsLen1, region.getMemStoreSize());
+    assertEquals(totalCellsLen1, region.getMemStoreDataSize());
     assertEquals(totalHeapSize1, ((CompactingMemStore) memstore).heapSize());
 
     MemStoreSize size = memstore.getFlushableSize();

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestEndToEndSplitTransaction.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestEndToEndSplitTransaction.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestEndToEndSplitTransaction.java
index 2c12341..b0302f6 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestEndToEndSplitTransaction.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestEndToEndSplitTransaction.java
@@ -321,7 +321,7 @@ public class TestEndToEndSplitTransaction {
     admin.flushRegion(regionName);
     log("blocking until flush is complete: " + 
Bytes.toStringBinary(regionName));
     Threads.sleepWithoutInterrupt(500);
-    while (rs.getOnlineRegion(regionName).getMemStoreSize() > 0) {
+    while (rs.getOnlineRegion(regionName).getMemStoreDataSize() > 0) {
       Threads.sleep(50);
     }
   }

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
index 88e1aa2..31dfa2a 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
@@ -310,7 +310,7 @@ public class TestHRegion {
     region.put(put);
     // Close with something in memstore and something in the snapshot.  Make 
sure all is cleared.
     region.close();
-    assertEquals(0, region.getMemStoreSize());
+    assertEquals(0, region.getMemStoreDataSize());
     HBaseTestingUtility.closeRegionAndWAL(region);
   }
 
@@ -391,14 +391,14 @@ public class TestHRegion {
     HRegion region = initHRegion(tableName, null, null, false, 
Durability.SYNC_WAL, hLog,
         COLUMN_FAMILY_BYTES);
     HStore store = region.getStore(COLUMN_FAMILY_BYTES);
-    assertEquals(0, region.getMemStoreSize());
+    assertEquals(0, region.getMemStoreDataSize());
 
     // Put one value
     byte [] value = Bytes.toBytes(method);
     Put put = new Put(value);
     put.addColumn(COLUMN_FAMILY_BYTES, Bytes.toBytes("abc"), value);
     region.put(put);
-    long onePutSize = region.getMemStoreSize();
+    long onePutSize = region.getMemStoreDataSize();
     assertTrue(onePutSize > 0);
 
     RegionCoprocessorHost mockedCPHost = 
Mockito.mock(RegionCoprocessorHost.class);
@@ -414,7 +414,7 @@ public class TestHRegion {
     } catch (IOException expected) {
     }
     long expectedSize = onePutSize * 2;
-    assertEquals("memstoreSize should be incremented", expectedSize, 
region.getMemStoreSize());
+    assertEquals("memstoreSize should be incremented", expectedSize, 
region.getMemStoreDataSize());
     assertEquals("flushable size should be incremented", expectedSize,
         store.getFlushableSize().getDataSize());
 
@@ -459,13 +459,13 @@ public class TestHRegion {
           // Initialize region
           region = initHRegion(tableName, null, null, false, 
Durability.SYNC_WAL, wal,
               COLUMN_FAMILY_BYTES);
-          long size = region.getMemStoreSize();
+          long size = region.getMemStoreDataSize();
           Assert.assertEquals(0, size);
           // Put one item into memstore.  Measure the size of one item in 
memstore.
           Put p1 = new Put(row);
           p1.add(new KeyValue(row, COLUMN_FAMILY_BYTES, qual1, 1, (byte[]) 
null));
           region.put(p1);
-          final long sizeOfOnePut = region.getMemStoreSize();
+          final long sizeOfOnePut = region.getMemStoreDataSize();
           // Fail a flush which means the current memstore will hang out as 
memstore 'snapshot'.
           try {
             LOG.info("Flushing");
@@ -478,7 +478,7 @@ public class TestHRegion {
           // Make it so all writes succeed from here on out
           ffs.fault.set(false);
           // Check sizes.  Should still be the one entry.
-          Assert.assertEquals(sizeOfOnePut, region.getMemStoreSize());
+          Assert.assertEquals(sizeOfOnePut, region.getMemStoreDataSize());
           // Now add two entries so that on this next flush that fails, we can 
see if we
           // subtract the right amount, the snapshot size only.
           Put p2 = new Put(row);
@@ -486,13 +486,13 @@ public class TestHRegion {
           p2.add(new KeyValue(row, COLUMN_FAMILY_BYTES, qual3, 3, 
(byte[])null));
           region.put(p2);
           long expectedSize = sizeOfOnePut * 3;
-          Assert.assertEquals(expectedSize, region.getMemStoreSize());
+          Assert.assertEquals(expectedSize, region.getMemStoreDataSize());
           // Do a successful flush.  It will clear the snapshot only.  Thats 
how flushes work.
           // If already a snapshot, we clear it else we move the memstore to 
be snapshot and flush
           // it
           region.flush(true);
           // Make sure our memory accounting is right.
-          Assert.assertEquals(sizeOfOnePut * 2, region.getMemStoreSize());
+          Assert.assertEquals(sizeOfOnePut * 2, region.getMemStoreDataSize());
         } finally {
           HBaseTestingUtility.closeRegionAndWAL(region);
         }
@@ -524,7 +524,7 @@ public class TestHRegion {
           // Initialize region
           region = initHRegion(tableName, null, null, false,
               Durability.SYNC_WAL, wal, COLUMN_FAMILY_BYTES);
-          long size = region.getMemStoreSize();
+          long size = region.getMemStoreDataSize();
           Assert.assertEquals(0, size);
           // Put one item into memstore.  Measure the size of one item in 
memstore.
           Put p1 = new Put(row);

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionReplayEvents.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionReplayEvents.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionReplayEvents.java
index 44ff84d..26b57b0 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionReplayEvents.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionReplayEvents.java
@@ -366,7 +366,7 @@ public class TestHRegionReplayEvents {
         verifyData(secondaryRegion, 0, lastReplayed, cq, families);
         HStore store = secondaryRegion.getStore(Bytes.toBytes("cf1"));
         long storeMemstoreSize = store.getMemStoreSize().getHeapSize();
-        long regionMemstoreSize = secondaryRegion.getMemStoreSize();
+        long regionMemstoreSize = secondaryRegion.getMemStoreDataSize();
         long storeFlushableSize = store.getFlushableSize().getHeapSize();
         long storeSize = store.getSize();
         long storeSizeUncompressed = store.getStoreSizeUncompressed();
@@ -395,7 +395,7 @@ public class TestHRegionReplayEvents {
           assertTrue(storeFlushableSize > newFlushableSize);
 
           // assert that the region memstore is smaller now
-          long newRegionMemstoreSize = secondaryRegion.getMemStoreSize();
+          long newRegionMemstoreSize = secondaryRegion.getMemStoreDataSize();
           assertTrue(regionMemstoreSize > newRegionMemstoreSize);
 
           // assert that the store sizes are bigger
@@ -465,7 +465,7 @@ public class TestHRegionReplayEvents {
         // first verify that everything is replayed and visible before flush 
event replay
         HStore store = secondaryRegion.getStore(Bytes.toBytes("cf1"));
         long storeMemstoreSize = store.getMemStoreSize().getHeapSize();
-        long regionMemstoreSize = secondaryRegion.getMemStoreSize();
+        long regionMemstoreSize = secondaryRegion.getMemStoreDataSize();
         long storeFlushableSize = store.getFlushableSize().getHeapSize();
 
         if (flushDesc.getAction() == FlushAction.START_FLUSH) {
@@ -505,7 +505,7 @@ public class TestHRegionReplayEvents {
     assertNotNull(secondaryRegion.getPrepareFlushResult());
     assertEquals(secondaryRegion.getPrepareFlushResult().flushOpSeqId,
       startFlushDesc.getFlushSequenceNumber());
-    assertTrue(secondaryRegion.getMemStoreSize() > 0); // memstore is not empty
+    assertTrue(secondaryRegion.getMemStoreDataSize() > 0); // memstore is not 
empty
     verifyData(secondaryRegion, 0, numRows, cq, families);
 
     // Test case 2: replay a flush start marker with a smaller seqId
@@ -518,7 +518,7 @@ public class TestHRegionReplayEvents {
     assertNotNull(secondaryRegion.getPrepareFlushResult());
     assertEquals(secondaryRegion.getPrepareFlushResult().flushOpSeqId,
       startFlushDesc.getFlushSequenceNumber());
-    assertTrue(secondaryRegion.getMemStoreSize() > 0); // memstore is not empty
+    assertTrue(secondaryRegion.getMemStoreDataSize() > 0); // memstore is not 
empty
     verifyData(secondaryRegion, 0, numRows, cq, families);
 
     // Test case 3: replay a flush start marker with a larger seqId
@@ -531,7 +531,7 @@ public class TestHRegionReplayEvents {
     assertNotNull(secondaryRegion.getPrepareFlushResult());
     assertEquals(secondaryRegion.getPrepareFlushResult().flushOpSeqId,
       startFlushDesc.getFlushSequenceNumber());
-    assertTrue(secondaryRegion.getMemStoreSize() > 0); // memstore is not empty
+    assertTrue(secondaryRegion.getMemStoreDataSize() > 0); // memstore is not 
empty
     verifyData(secondaryRegion, 0, numRows, cq, families);
 
     LOG.info("-- Verifying edits from secondary");
@@ -600,7 +600,7 @@ public class TestHRegionReplayEvents {
     for (HStore s : secondaryRegion.getStores()) {
       assertEquals(expectedStoreFileCount, s.getStorefilesCount());
     }
-    long regionMemstoreSize = secondaryRegion.getMemStoreSize();
+    long regionMemstoreSize = secondaryRegion.getMemStoreDataSize();
 
     // Test case 1: replay the a flush commit marker smaller than what we have 
prepared
     LOG.info("Testing replaying flush COMMIT " + commitFlushDesc + " on top of 
flush START"
@@ -620,7 +620,7 @@ public class TestHRegionReplayEvents {
     assertTrue(newFlushableSize > 0); // assert that the memstore is not 
dropped
 
     // assert that the region memstore is same as before
-    long newRegionMemstoreSize = secondaryRegion.getMemStoreSize();
+    long newRegionMemstoreSize = secondaryRegion.getMemStoreDataSize();
     assertEquals(regionMemstoreSize, newRegionMemstoreSize);
 
     assertNotNull(secondaryRegion.getPrepareFlushResult()); // not dropped
@@ -690,7 +690,7 @@ public class TestHRegionReplayEvents {
     for (HStore s : secondaryRegion.getStores()) {
       assertEquals(expectedStoreFileCount, s.getStorefilesCount());
     }
-    long regionMemstoreSize = secondaryRegion.getMemStoreSize();
+    long regionMemstoreSize = secondaryRegion.getMemStoreDataSize();
 
     // Test case 1: replay the a flush commit marker larger than what we have 
prepared
     LOG.info("Testing replaying flush COMMIT " + commitFlushDesc + " on top of 
flush START"
@@ -710,7 +710,7 @@ public class TestHRegionReplayEvents {
     assertTrue(newFlushableSize > 0); // assert that the memstore is not 
dropped
 
     // assert that the region memstore is smaller than before, but not empty
-    long newRegionMemstoreSize = secondaryRegion.getMemStoreSize();
+    long newRegionMemstoreSize = secondaryRegion.getMemStoreDataSize();
     assertTrue(newRegionMemstoreSize > 0);
     assertTrue(regionMemstoreSize > newRegionMemstoreSize);
 
@@ -791,7 +791,7 @@ public class TestHRegionReplayEvents {
     for (HStore s : secondaryRegion.getStores()) {
       assertEquals(expectedStoreFileCount, s.getStorefilesCount());
     }
-    long regionMemstoreSize = secondaryRegion.getMemStoreSize();
+    long regionMemstoreSize = secondaryRegion.getMemStoreDataSize();
 
     // Test case 1: replay a flush commit marker without start flush marker
     assertNull(secondaryRegion.getPrepareFlushResult());
@@ -820,7 +820,7 @@ public class TestHRegionReplayEvents {
     }
 
     // assert that the region memstore is same as before (we could not drop)
-    long newRegionMemstoreSize = secondaryRegion.getMemStoreSize();
+    long newRegionMemstoreSize = secondaryRegion.getMemStoreDataSize();
     if (droppableMemstore) {
       assertTrue(0 == newRegionMemstoreSize);
     } else {
@@ -890,7 +890,7 @@ public class TestHRegionReplayEvents {
     for (HStore s : secondaryRegion.getStores()) {
       assertEquals(expectedStoreFileCount, s.getStorefilesCount());
     }
-    long regionMemstoreSize = secondaryRegion.getMemStoreSize();
+    long regionMemstoreSize = secondaryRegion.getMemStoreDataSize();
     assertTrue(regionMemstoreSize == 0);
 
     // now replay the region open event that should contain new file locations
@@ -907,7 +907,7 @@ public class TestHRegionReplayEvents {
     assertTrue(newFlushableSize == MutableSegment.DEEP_OVERHEAD);
 
     // assert that the region memstore is empty
-    long newRegionMemstoreSize = secondaryRegion.getMemStoreSize();
+    long newRegionMemstoreSize = secondaryRegion.getMemStoreDataSize();
     assertTrue(newRegionMemstoreSize == 0);
 
     assertNull(secondaryRegion.getPrepareFlushResult()); //prepare snapshot 
should be dropped if any
@@ -986,7 +986,7 @@ public class TestHRegionReplayEvents {
     assertTrue(newSnapshotSize.getDataSize() == 0);
 
     // assert that the region memstore is empty
-    long newRegionMemstoreSize = secondaryRegion.getMemStoreSize();
+    long newRegionMemstoreSize = secondaryRegion.getMemStoreDataSize();
     assertTrue(newRegionMemstoreSize == 0);
 
     assertNull(secondaryRegion.getPrepareFlushResult()); //prepare snapshot 
should be dropped if any
@@ -1434,7 +1434,7 @@ public class TestHRegionReplayEvents {
     LOG.info("-- Replaying edits in secondary");
 
     // Test case 4: replay some edits, ensure that memstore is dropped.
-    assertTrue(secondaryRegion.getMemStoreSize() == 0);
+    assertTrue(secondaryRegion.getMemStoreDataSize() == 0);
     putDataWithFlushes(primaryRegion, 400, 400, 0);
     numRows = 400;
 
@@ -1452,11 +1452,11 @@ public class TestHRegionReplayEvents {
       }
     }
 
-    assertTrue(secondaryRegion.getMemStoreSize() > 0);
+    assertTrue(secondaryRegion.getMemStoreDataSize() > 0);
 
     secondaryRegion.refreshStoreFiles();
 
-    assertTrue(secondaryRegion.getMemStoreSize() == 0);
+    assertTrue(secondaryRegion.getMemStoreDataSize() == 0);
 
     LOG.info("-- Verifying edits from primary");
     verifyData(primaryRegion, 0, numRows, cq, families);

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStore.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStore.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStore.java
index ea40200..9479890 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStore.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStore.java
@@ -265,7 +265,7 @@ public class TestHStore {
         MemStoreSizing kvSize = new MemStoreSizing();
         store.add(new KeyValue(row, family, qf1, 1, (byte[]) null), kvSize);
         // add the heap size of active (mutable) segment
-        kvSize.incMemStoreSize(0, MutableSegment.DEEP_OVERHEAD);
+        kvSize.incMemStoreSize(0, MutableSegment.DEEP_OVERHEAD, 0);
         size = store.memstore.getFlushableSize();
         assertEquals(kvSize, size);
         // Flush.  Bug #1 from HBASE-10466.  Make sure size calculation on 
failed flush is right.
@@ -278,12 +278,12 @@ public class TestHStore {
         }
         // due to snapshot, change mutable to immutable segment
         kvSize.incMemStoreSize(0,
-            
CSLMImmutableSegment.DEEP_OVERHEAD_CSLM-MutableSegment.DEEP_OVERHEAD);
+            
CSLMImmutableSegment.DEEP_OVERHEAD_CSLM-MutableSegment.DEEP_OVERHEAD, 0);
         size = store.memstore.getFlushableSize();
         assertEquals(kvSize, size);
         MemStoreSizing kvSize2 = new MemStoreSizing();
         store.add(new KeyValue(row, family, qf2, 2, (byte[])null), kvSize2);
-        kvSize2.incMemStoreSize(0, MutableSegment.DEEP_OVERHEAD);
+        kvSize2.incMemStoreSize(0, MutableSegment.DEEP_OVERHEAD, 0);
         // Even though we add a new kv, we expect the flushable size to be 
'same' since we have
         // not yet cleared the snapshot -- the above flush failed.
         assertEquals(kvSize, size);

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestPerColumnFamilyFlush.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestPerColumnFamilyFlush.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestPerColumnFamilyFlush.java
index 353cc28..fded9ba 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestPerColumnFamilyFlush.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestPerColumnFamilyFlush.java
@@ -149,7 +149,7 @@ public class TestPerColumnFamilyFlush {
       }
     }
 
-    long totalMemstoreSize = region.getMemStoreSize();
+    long totalMemstoreSize = region.getMemStoreDataSize();
 
     // Find the smallest LSNs for edits wrt to each CF.
     long smallestSeqCF1 = region.getOldestSeqIdOfStore(FAMILY1);
@@ -192,7 +192,7 @@ public class TestPerColumnFamilyFlush {
     cf1MemstoreSize = region.getStore(FAMILY1).getMemStoreSize();
     cf2MemstoreSize = region.getStore(FAMILY2).getMemStoreSize();
     cf3MemstoreSize = region.getStore(FAMILY3).getMemStoreSize();
-    totalMemstoreSize = region.getMemStoreSize();
+    totalMemstoreSize = region.getMemStoreDataSize();
     smallestSeqInRegionCurrentMemstore = getWAL(region)
         
.getEarliestMemStoreSeqNum(region.getRegionInfo().getEncodedNameAsBytes());
 
@@ -230,7 +230,7 @@ public class TestPerColumnFamilyFlush {
     cf1MemstoreSize = region.getStore(FAMILY1).getMemStoreSize();
     cf2MemstoreSize = region.getStore(FAMILY2).getMemStoreSize();
     cf3MemstoreSize = region.getStore(FAMILY3).getMemStoreSize();
-    totalMemstoreSize = region.getMemStoreSize();
+    totalMemstoreSize = region.getMemStoreDataSize();
     smallestSeqInRegionCurrentMemstore = getWAL(region)
         
.getEarliestMemStoreSeqNum(region.getRegionInfo().getEncodedNameAsBytes());
 
@@ -265,7 +265,7 @@ public class TestPerColumnFamilyFlush {
 
     // Since we won't find any CF above the threshold, and hence no specific
     // store to flush, we should flush all the memstores.
-    assertEquals(0, region.getMemStoreSize());
+    assertEquals(0, region.getMemStoreDataSize());
     HBaseTestingUtility.closeRegionAndWAL(region);
   }
 
@@ -289,7 +289,7 @@ public class TestPerColumnFamilyFlush {
       }
     }
 
-    long totalMemstoreSize = region.getMemStoreSize();
+    long totalMemstoreSize = region.getMemStoreDataSize();
 
     // Find the sizes of the memstores of each CF.
     MemStoreSize cf1MemstoreSize = region.getStore(FAMILY1).getMemStoreSize();
@@ -312,7 +312,7 @@ public class TestPerColumnFamilyFlush {
     cf1MemstoreSize = region.getStore(FAMILY1).getMemStoreSize();
     cf2MemstoreSize = region.getStore(FAMILY2).getMemStoreSize();
     cf3MemstoreSize = region.getStore(FAMILY3).getMemStoreSize();
-    totalMemstoreSize = region.getMemStoreSize();
+    totalMemstoreSize = region.getMemStoreDataSize();
     long smallestSeqInRegionCurrentMemstore =
         
region.getWAL().getEarliestMemStoreSeqNum(region.getRegionInfo().getEncodedNameAsBytes());
 
@@ -381,7 +381,7 @@ public class TestPerColumnFamilyFlush {
 
       long totalMemstoreSize;
       long cf1MemstoreSize, cf2MemstoreSize, cf3MemstoreSize;
-      totalMemstoreSize = desiredRegion.getMemStoreSize();
+      totalMemstoreSize = desiredRegion.getMemStoreDataSize();
 
       // Find the sizes of the memstores of each CF.
       cf1MemstoreSize = 
desiredRegion.getStore(FAMILY1).getMemStoreSize().getDataSize();
@@ -504,12 +504,12 @@ public class TestPerColumnFamilyFlush {
 
         @Override
         public boolean evaluate() throws Exception {
-          return desiredRegion.getMemStoreSize() == 0;
+          return desiredRegion.getMemStoreDataSize() == 0;
         }
 
         @Override
         public String explainFailure() throws Exception {
-          long memstoreSize = desiredRegion.getMemStoreSize();
+          long memstoreSize = desiredRegion.getMemStoreDataSize();
           if (memstoreSize > 0) {
             return "Still have unflushed entries in memstore, memstore size is 
" + memstoreSize;
           }
@@ -551,7 +551,7 @@ public class TestPerColumnFamilyFlush {
       put.addColumn(FAMILY3, qf, value3);
       table.put(put);
       // slow down to let regionserver flush region.
-      while (region.getMemStoreSize() > memstoreFlushSize) {
+      while (region.getMemStoreHeapSize() > memstoreFlushSize) {
         Thread.sleep(100);
       }
     }

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerAccounting.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerAccounting.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerAccounting.java
index ede9cae..7bd9e16 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerAccounting.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerAccounting.java
@@ -42,7 +42,7 @@ public class TestRegionServerAccounting {
     // try for default cases
     RegionServerAccounting regionServerAccounting = new 
RegionServerAccounting(conf);
     MemStoreSize memstoreSize =
-        new MemStoreSize(3L * 1024 * 1024 * 1024, 1L * 1024 * 1024 * 1024);
+        new MemStoreSize((3L * 1024L * 1024L * 1024L), (1L * 1024L * 1024L * 
1024L), 0);
     regionServerAccounting.incGlobalMemStoreSize(memstoreSize);
     assertEquals(FlushType.ABOVE_ONHEAP_HIGHER_MARK,
       regionServerAccounting.isAboveHighWaterMark());
@@ -55,7 +55,7 @@ public class TestRegionServerAccounting {
     // try for default cases
     RegionServerAccounting regionServerAccounting = new 
RegionServerAccounting(conf);
     MemStoreSize memstoreSize =
-        new MemStoreSize(3L * 1024 * 1024 * 1024, 1L * 1024 * 1024 * 1024);
+        new MemStoreSize((3L * 1024L * 1024L * 1024L), (1L * 1024L * 1024L * 
1024L), 0);
     regionServerAccounting.incGlobalMemStoreSize(memstoreSize);
     assertEquals(FlushType.ABOVE_ONHEAP_LOWER_MARK,
       regionServerAccounting.isAboveLowWaterMark());
@@ -65,12 +65,12 @@ public class TestRegionServerAccounting {
   public void testOffheapMemstoreHigherWaterMarkLimitsDueToDataSize() {
     Configuration conf = HBaseConfiguration.create();
     // setting 1G as offheap data size
-    conf.setLong(MemorySizeUtil.OFFHEAP_MEMSTORE_SIZE_KEY, (1L * 1024));
+    conf.setLong(MemorySizeUtil.OFFHEAP_MEMSTORE_SIZE_KEY, (1L * 1024L));
     // try for default cases
     RegionServerAccounting regionServerAccounting = new 
RegionServerAccounting(conf);
     // this will breach offheap limit as data size is higher and not due to 
heap size
     MemStoreSize memstoreSize =
-        new MemStoreSize(3L * 1024 * 1024 * 1024, 1L * 1024 * 1024 * 1024);
+        new MemStoreSize((3L * 1024L * 1024L * 1024L), 0, (1L * 1024L * 1024L 
* 1024L));
     regionServerAccounting.incGlobalMemStoreSize(memstoreSize);
     assertEquals(FlushType.ABOVE_OFFHEAP_HIGHER_MARK,
       regionServerAccounting.isAboveHighWaterMark());
@@ -81,12 +81,12 @@ public class TestRegionServerAccounting {
     Configuration conf = HBaseConfiguration.create();
     conf.setFloat(MemorySizeUtil.MEMSTORE_SIZE_KEY, 0.2f);
     // setting 1G as offheap data size
-    conf.setLong(MemorySizeUtil.OFFHEAP_MEMSTORE_SIZE_KEY, (1L * 1024));
+    conf.setLong(MemorySizeUtil.OFFHEAP_MEMSTORE_SIZE_KEY, (1L * 1024L));
     // try for default cases
     RegionServerAccounting regionServerAccounting = new 
RegionServerAccounting(conf);
     // this will breach higher limit as heap size is higher and not due to 
offheap size
     MemStoreSize memstoreSize =
-        new MemStoreSize(3L * 1024 * 1024, 2L * 1024 * 1024 * 1024);
+        new MemStoreSize((3L * 1024L * 1024L), (2L * 1024L * 1024L * 1024L), 
0);
     regionServerAccounting.incGlobalMemStoreSize(memstoreSize);
     assertEquals(FlushType.ABOVE_ONHEAP_HIGHER_MARK,
       regionServerAccounting.isAboveHighWaterMark());
@@ -96,12 +96,12 @@ public class TestRegionServerAccounting {
   public void testOffheapMemstoreLowerWaterMarkLimitsDueToDataSize() {
     Configuration conf = HBaseConfiguration.create();
     // setting 1G as offheap data size
-    conf.setLong(MemorySizeUtil.OFFHEAP_MEMSTORE_SIZE_KEY, (1L * 1024));
+    conf.setLong(MemorySizeUtil.OFFHEAP_MEMSTORE_SIZE_KEY, (1L * 1024L));
     // try for default cases
     RegionServerAccounting regionServerAccounting = new 
RegionServerAccounting(conf);
     // this will breach offheap limit as data size is higher and not due to 
heap size
     MemStoreSize memstoreSize =
-        new MemStoreSize(3L * 1024 * 1024 * 1024, 1L * 1024 * 1024 * 1024);
+        new MemStoreSize((3L * 1024L * 1024L * 1024L), 0, (1L * 1024L * 1024L 
* 1024L));
     regionServerAccounting.incGlobalMemStoreSize(memstoreSize);
     assertEquals(FlushType.ABOVE_OFFHEAP_LOWER_MARK,
       regionServerAccounting.isAboveLowWaterMark());
@@ -112,12 +112,12 @@ public class TestRegionServerAccounting {
     Configuration conf = HBaseConfiguration.create();
     conf.setFloat(MemorySizeUtil.MEMSTORE_SIZE_KEY, 0.2f);
     // setting 1G as offheap data size
-    conf.setLong(MemorySizeUtil.OFFHEAP_MEMSTORE_SIZE_KEY, (1L * 1024));
+    conf.setLong(MemorySizeUtil.OFFHEAP_MEMSTORE_SIZE_KEY, (1L * 1024L));
     // try for default cases
     RegionServerAccounting regionServerAccounting = new 
RegionServerAccounting(conf);
     // this will breach higher limit as heap size is higher and not due to 
offheap size
     MemStoreSize memstoreSize =
-        new MemStoreSize(3L * 1024 * 1024, 2L * 1024 * 1024 * 1024);
+        new MemStoreSize((3L * 1024L * 1024L), (2L * 1024L * 1024L * 1024L), 
0);
     regionServerAccounting.incGlobalMemStoreSize(memstoreSize);
     assertEquals(FlushType.ABOVE_ONHEAP_LOWER_MARK,
       regionServerAccounting.isAboveLowWaterMark());

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWALLockup.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWALLockup.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWALLockup.java
index ca65914..5eb8fa8 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWALLockup.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWALLockup.java
@@ -264,8 +264,8 @@ public class TestWALLockup {
         @Override
         public void run() {
           try {
-            if (region.getMemStoreSize() <= 0) {
-              throw new IOException("memstore size=" + 
region.getMemStoreSize());
+            if (region.getMemStoreDataSize() <= 0) {
+              throw new IOException("memstore size=" + 
region.getMemStoreDataSize());
             }
             region.flush(false);
           } catch (IOException e) {

http://git-wip-us.apache.org/repos/asf/hbase/blob/f3bb9b96/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWalAndCompactingMemStoreFlush.java
----------------------------------------------------------------------
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWalAndCompactingMemStoreFlush.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWalAndCompactingMemStoreFlush.java
index 3f73d37..15bf2a4 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWalAndCompactingMemStoreFlush.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWalAndCompactingMemStoreFlush.java
@@ -172,7 +172,7 @@ public class TestWalAndCompactingMemStoreFlush {
       region.put(createPut(2, i));
     }
 
-    long totalMemstoreSize = region.getMemStoreSize();
+    long totalMemstoreSize = region.getMemStoreDataSize();
 
     // Find the smallest LSNs for edits wrt to each CF.
     long smallestSeqCF1PhaseI = region.getOldestSeqIdOfStore(FAMILY1);
@@ -363,13 +363,13 @@ public class TestWalAndCompactingMemStoreFlush {
     s = s + "----AFTER THIRD AND FORTH FLUSH, The smallest sequence in region 
WAL is: "
         + smallestSeqInRegionCurrentMemstorePhaseV
         + ". After additional inserts and last flush, the entire region size 
is:" + region
-        .getMemStoreSize()
+        .getMemStoreDataSize()
         + "\n----------------------------------\n";
 
     // Since we won't find any CF above the threshold, and hence no specific
     // store to flush, we should flush all the memstores
     // Also compacted memstores are flushed to disk.
-    assertEquals(0, region.getMemStoreSize());
+    assertEquals(0, region.getMemStoreDataSize());
     System.out.println(s);
     HBaseTestingUtility.closeRegionAndWAL(region);
   }
@@ -411,7 +411,7 @@ public class TestWalAndCompactingMemStoreFlush {
     
/*------------------------------------------------------------------------------*/
     
/*------------------------------------------------------------------------------*/
     /* PHASE I - collect sizes */
-    long totalMemstoreSizePhaseI = region.getMemStoreSize();
+    long totalMemstoreSizePhaseI = region.getMemStoreDataSize();
     // Find the smallest LSNs for edits wrt to each CF.
     long smallestSeqCF1PhaseI = region.getOldestSeqIdOfStore(FAMILY1);
     long smallestSeqCF2PhaseI = region.getOldestSeqIdOfStore(FAMILY2);
@@ -474,7 +474,7 @@ public class TestWalAndCompactingMemStoreFlush {
         
.getEarliestMemStoreSeqNum(region.getRegionInfo().getEncodedNameAsBytes());
     // Find the smallest LSNs for edits wrt to each CF.
     long smallestSeqCF3PhaseII = region.getOldestSeqIdOfStore(FAMILY3);
-    long totalMemstoreSizePhaseII = region.getMemStoreSize();
+    long totalMemstoreSizePhaseII = region.getMemStoreDataSize();
 
     
/*------------------------------------------------------------------------------*/
     /* PHASE II - validation */
@@ -517,7 +517,7 @@ public class TestWalAndCompactingMemStoreFlush {
     /* PHASE III - collect sizes */
     // How much does the CF1 memstore occupy now? Will be used later.
     MemStoreSize cf1MemstoreSizePhaseIII = 
region.getStore(FAMILY1).getMemStoreSize();
-    long totalMemstoreSizePhaseIII = region.getMemStoreSize();
+    long totalMemstoreSizePhaseIII = region.getMemStoreDataSize();
 
     
/*------------------------------------------------------------------------------*/
     /* PHASE III - validation */
@@ -575,7 +575,7 @@ public class TestWalAndCompactingMemStoreFlush {
     MemStoreSize cf3MemstoreSizePhaseV = 
region.getStore(FAMILY3).getMemStoreSize();
     long smallestSeqInRegionCurrentMemstorePhaseV = getWAL(region)
         
.getEarliestMemStoreSeqNum(region.getRegionInfo().getEncodedNameAsBytes());
-    long totalMemstoreSizePhaseV = region.getMemStoreSize();
+    long totalMemstoreSizePhaseV = region.getMemStoreDataSize();
 
     
/*------------------------------------------------------------------------------*/
     /* PHASE V - validation */
@@ -663,7 +663,7 @@ public class TestWalAndCompactingMemStoreFlush {
     ((CompactingMemStore) ((HStore) 
region.getStore(FAMILY1)).memstore).setCompositeSnapshot(false);
     ((CompactingMemStore) ((HStore) 
region.getStore(FAMILY3)).memstore).setCompositeSnapshot(false);
 
-    long totalMemstoreSize = region.getMemStoreSize();
+    long totalMemstoreSize = region.getMemStoreDataSize();
 
     // Find the sizes of the memstores of each CF.
     MemStoreSize cf1MemstoreSizePhaseI = 
region.getStore(FAMILY1).getMemStoreSize();
@@ -794,7 +794,7 @@ public class TestWalAndCompactingMemStoreFlush {
       region.put(createPut(2, i));
     }
 
-    long totalMemstoreSize = region.getMemStoreSize();
+    long totalMemstoreSize = region.getMemStoreDataSize();
 
     // test in-memory flashing into CAM here
     ((CompactingMemStore) 
((HStore)region.getStore(FAMILY1)).memstore).setIndexType(

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