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https://issues.apache.org/jira/browse/HBASE-14921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15424881#comment-15424881
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Lars Hofhansl commented on HBASE-14921:
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MSLAB forces another copy of the data backing each Cell coming in, consuming
memory bandwidth. With G1GC that does not appear to be necessary, since G1
manages small'ish memory regions anyway.
I will repeat what I always say: Let's not try to be smarter than the garbage
collector. Chances are we're not :)
> 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,
> HBASE-14921-V06-CAO.patch, HBASE-14921-V08-CAO.patch,
> HBASE-14921-V09-CAO.patch, HBASE-14921-V10-CAO.patch,
> HBASE-14921-V11-CAO.patch, HBASE-14921-V11-CAO.patch,
> InitialCellArrayMapEvaluation.pdf,
> IntroductiontoNewFlatandCompactMemStore.pdf, MemStoreSizes.pdf,
> MemstoreItrCountissue.patch, NewCompactingMemStoreFlow.pptx
>
>
> Memory optimizations including compressed format representation and offheap
> allocations
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