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https://issues.apache.org/jira/browse/HBASE-20483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16472684#comment-16472684
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Anastasia Braginsky commented on HBASE-20483:
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{quote}bq.I'm back to this issue now via HBASE-20411 and other explorations
bq.Yeah, its after. (regarding IMC disabled)
{quote}
I see that you are working without IMC and that you believe the problem is due
to locking around the sizing (HBASE-20411). Let's see if it helps.
On the other note, is there MSLAB in the hbase 1.4 (the version you are
comparing to)?
> [PERFORMANCE] Flushing is 2x slower in hbase2.
> ----------------------------------------------
>
> Key: HBASE-20483
> URL: https://issues.apache.org/jira/browse/HBASE-20483
> Project: HBase
> Issue Type: Sub-task
> Components: Performance
> Reporter: stack
> Assignee: stack
> Priority: Major
> Attachments:
> 0001-HBASE-20483-perpertual-flush-and-memstore-fill-branch-2.0.patch,
> 0001-HBASE-20483-perpetual-flush.branch-1.4.patch,
> 0001-HBASE-20483-perpetual-flush.branch-1.4.patch,
> PerpetualFlushingProgram.patch, PerpetualFlushingProgram1.2.patch,
> SnapshotSegmentScanner_2.0.0.patch
>
>
> When flush is slow, memstores backup and go slower. See "1.2.7 vs. 2.0.0
> Flush History"
> https://docs.google.com/spreadsheets/d/1sihTxb4aCplR3Rr_GGXkPlwhMIm-CbB9j_5339AS0Zc/edit#gid=1016758826
> for compare. First noted by [~anoop.hbase]
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