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https://issues.apache.org/jira/browse/HBASE-14921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15385330#comment-15385330
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ramkrishna.s.vasudevan commented on HBASE-14921:
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bq.Can we do anything better? It looks like we will never able to deal with
deletion, because this compaction is always minor.
Yes. I think so. So better to leave it as is. That is why we were saying that
if for a default case there are not many version available, doing a compaction
may not be really needed. Instead if we can flatten the segments and directly
flush all the segments in the pipeline will be good enough and to see we are
reducing the heap overhead because of flattening.
> Memory optimizations
> --------------------
>
> Key: HBASE-14921
> URL: https://issues.apache.org/jira/browse/HBASE-14921
> Project: HBase
> Issue Type: Sub-task
> Affects Versions: 2.0.0
> Reporter: Eshcar Hillel
> Assignee: Anastasia Braginsky
> Attachments: CellBlocksSegmentInMemStore.pdf,
> CellBlocksSegmentinthecontextofMemStore(1).pdf, HBASE-14921-V01.patch,
> HBASE-14921-V02.patch, HBASE-14921-V03.patch, HBASE-14921-V04-CA-V02.patch,
> HBASE-14921-V04-CA.patch, HBASE-14921-V05-CAO.patch,
> InitialCellArrayMapEvaluation.pdf, IntroductiontoNewFlatandCompactMemStore.pdf
>
>
> Memory optimizations including compressed format representation and offheap
> allocations
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