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https://issues.apache.org/jira/browse/HBASE-16608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15591161#comment-15591161
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Anoop Sam John commented on HBASE-16608:
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So the net run for PE took ~15 secs more for COmpactingMemstore but that mainly
comes from the GC issue.. We can see total GC pause is ~33 secs more with
CompactingMemstore. I feel the remaining jiras on better policy making on
merges will solve this and we will see much more adv.
So the last patch on new RB request is having only diff wrt the way we combine
MSLABs from all merging segments. Instead of create a new HeapMSLAB and copy
pooled chunk refs from those into the new MSLAB's Q and do stuff of referring
nextMSLAB etc, it is done in a simpler way creating a new impl of MSLAB which
just wraps N MSLABs. Other than that part all other parts are same as in
latest patch that [~anastas] attached here.
Am +1 to commit this. Will commit only after +1 from
[~ebortnik]/[~anastas]/[~eshcar]
[~devaraj] Ur -1 was based on comments from Me/Ram. That bug was fixed in _08
version of patch itself but that was still having an issue of creating more GCs
as there were some issue with returning back chunks to pool. The _09 version
fixes this. Both me and Ram ran PE tests with 50 client threads and pumping
150GB of data and all looks fine.. Hope u will be ok to revoke ur -1. Thanks
DD.
> Introducing the ability to merge ImmutableSegments without copy-compaction or
> SQM usage
> ---------------------------------------------------------------------------------------
>
> Key: HBASE-16608
> URL: https://issues.apache.org/jira/browse/HBASE-16608
> Project: HBase
> Issue Type: Sub-task
> Reporter: Anastasia Braginsky
> Assignee: Anastasia Braginsky
> Attachments: HBASE-16417-V02.patch, HBASE-16417-V04.patch,
> HBASE-16417-V06.patch, HBASE-16417-V07.patch, HBASE-16417-V08.patch,
> HBASE-16417-V10.patch, HBASE-16608-V01.patch, HBASE-16608-V03.patch,
> HBASE-16608-V04.patch, HBASE-16608-V08.patch, HBASE-16608-V09.patch
>
>
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