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https://issues.apache.org/jira/browse/HBASE-23107?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16949279#comment-16949279
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Reid Chan edited comment on HBASE-23107 at 10/11/19 8:59 AM:
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Ping [~anoop.hbase], would you like to give a review? You have better insights
over kinds of cache and mem issues.
was (Author: reidchan):
Ping [~anoop.hbase], would you like to give a review? You have better insights
over this issue.
> Avoid temp byte array creation when doing cacheDataOnWrite
> ----------------------------------------------------------
>
> Key: HBASE-23107
> URL: https://issues.apache.org/jira/browse/HBASE-23107
> Project: HBase
> Issue Type: Improvement
> Reporter: chenxu
> Assignee: chenxu
> Priority: Major
>
> code in HFileBlock.Writer.cloneUncompressedBufferWithHeader
> {code:java}
> ByteBuffer cloneUncompressedBufferWithHeader() {
> expectState(State.BLOCK_READY);
> byte[] uncompressedBlockBytesWithHeader = baosInMemory.toByteArray();
> …
> }
> {code}
> When cacheOnWrite feature enabled, a temp byte array was created in order to
> copy block’s data, we can avoid this by use of ByteBuffAllocator. This can
> improve GC performance in write heavy scenarios.
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