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https://issues.apache.org/jira/browse/HBASE-14202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14682409#comment-14682409
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Hudson commented on HBASE-14202:
--------------------------------
FAILURE: Integrated in HBase-TRUNK #6714 (See
[https://builds.apache.org/job/HBase-TRUNK/6714/])
HBASE-14202 Reduce garbage we create. (anoopsamjohn: rev
d49b1f60f4cec6f04768f28f678bf4329bfa7364)
*
hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/BufferedDataBlockEncoder.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileBlockIndex.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.java
* hbase-common/src/main/java/org/apache/hadoop/hbase/nio/ByteBuff.java
* hbase-common/src/main/java/org/apache/hadoop/hbase/nio/MultiByteBuff.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/ByteBufferIOEngine.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.java
* hbase-common/src/main/java/org/apache/hadoop/hbase/util/ObjectIntPair.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestByteBufferIOEngine.java
*
hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/FastDiffDeltaEncoder.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.java
*
hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/DiffKeyDeltaEncoder.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestFileIOEngine.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/io/encoding/TestBufferedDataBlockEncoder.java
* hbase-common/src/main/java/org/apache/hadoop/hbase/nio/SingleByteBuff.java
* hbase-common/src/test/java/org/apache/hadoop/hbase/nio/TestMultiByteBuff.java
> Reduce garbage we create
> ------------------------
>
> Key: HBASE-14202
> URL: https://issues.apache.org/jira/browse/HBASE-14202
> Project: HBase
> Issue Type: Sub-task
> Components: regionserver, Scanners
> Affects Versions: 2.0.0
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Fix For: 2.0.0
>
> Attachments: HBASE-14202.patch
>
>
> 2 optimizations wrt no# short living objects we create
> 1. IOEngine#read call to read from L2 cache is always creating a Pair object
> to return the BB and MemoryType. We can avoid this by making the read API to
> return a Cacheable. Pass the CacheableDeserializer, to be used, also to the
> read API. Setter for MemoryType is already there in Cacheable interface.
> 2. ByteBuff#asSubByteBuffer(int, int, Pair) avoids Pair object creation
> every time as we pass the shared Pair object. Still as pair can take only
> Objects, the primitive int has to be boxed into an Integer object every time.
> This can be avoided by creating a new Pair type which is a pair of an Object
> and a primitive int.
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