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https://issues.apache.org/jira/browse/HBASE-14921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15221281#comment-15221281
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Anoop Sam John commented on HBASE-14921:
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When we have say offheap MSLAB also, an entry added to CSLM (Cell object) will
have ~100 bytes overhead per cell.
The Cell[] way of CellBlock (CellBlockObjectArray) will have per Cell overhead
of 48 bytes
CellBlockSerialized way will have 12 bytes (or 8 bytes also)
Good going.
BTW HBASE-15179, under this we are doing some PoC and test with off heap
Memstore. But we have only CSLM added memstore now.. The overhead per Cell is
much more here. That is one issue we are seeing in our tests as well. So we
very much need ur work in for better results with offheap MSLAB :-) Great work
guys.
> 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
>
>
> Memory optimizations including compressed format representation and offheap
> allocations
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