SpriCoder commented on code in PR #14710:
URL: https://github.com/apache/iotdb/pull/14710#discussion_r1981326247
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iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/memory/MemoryManager.java:
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@@ -471,6 +487,121 @@ public long getUsedMemorySizeInBytes() {
return memorySize;
}
+ /** Get static allocated memory size in bytes of memory manager */
+ public long getStaticAllocatedMemorySizeInBytes() {
+ long memorySize = staticAllocatedMemorySizeInBytes;
+ for (MemoryManager child : children.values()) {
+ memorySize += child.getStaticAllocatedMemorySizeInBytes();
+ }
+ return memorySize;
+ }
+
+ /** Get used memory ratio */
+ public double getUsedMemoryRatio() {
+ return (double) getUsedMemorySizeInBytes() / totalMemorySizeInBytes;
+ }
+
+ // endregion
+
+ // region auto adapt memory
+ /**
+ * Whether this memory manager is available to shrink
+ *
+ * @return true if available to shrink, otherwise false
+ */
+ public boolean isAvailableToShrink() {
+ return totalAllocatedMemorySizeInBytes - totalMemorySizeInBytes
+ < totalAllocatedMemorySizeInBytes / 10
+ && totalMemorySizeInBytes != allocatedMemorySizeInBytes;
+ }
+
+ /**
+ * Try to shrink this memory manager
+ *
+ * @return actual shrink size
+ */
+ public synchronized long shrink() {
+ long shrinkSize =
+ Math.min(
+ getAvailableMemorySizeInBytes() / 10,
+ totalMemorySizeInBytes - totalAllocatedMemorySizeInBytes * 9 / 10);
+ totalMemorySizeInBytes -= shrinkSize;
+ return shrinkSize;
+ }
+
+ /**
+ * Whether this memory manager is available to expand. If there are one
child memory manager or
+ * memory block available to expand, return true.
+ *
+ * @return true if available to expand, otherwise false
+ */
+ public boolean isAvailableToExpand() {
+ for (MemoryManager memoryManager : children.values()) {
+ if (memoryManager.isAvailableToExpand()) {
+ return true;
+ }
+ }
+ for (IMemoryBlock memoryBlock : allocatedMemoryBlocks.values()) {
+ if (memoryBlock.getMemoryBlockType() != MemoryBlockType.STATIC) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ public double getScore() {
+ return getUsedMemoryRatio();
+ }
Review Comment:
Sorry, it's my mistake and this method is not for this pr
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