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https://issues.apache.org/jira/browse/HBASE-13427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14571364#comment-14571364
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John Leach commented on HBASE-13427:
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Sorry for the delay, getting back to this one.
Here is a synopsis of the load profile. We are batching and writing around
100K puts per second on a regionserver. Each of these puts has to perform a
simple get of the row it is attempting to write. Once we apply HBASE-13378,
the addChangedReaderObserver immediately starts to hotspot.
Regards,
John Leach
> HStore#addChangedReaderObserver hotspots due to missing hashCode and equals
> on StoreScanner
> -------------------------------------------------------------------------------------------
>
> Key: HBASE-13427
> URL: https://issues.apache.org/jira/browse/HBASE-13427
> Project: HBase
> Issue Type: Bug
> Reporter: John Leach
> Assignee: John Leach
> Attachments: 13427-v4.txt, HBASE-13427.patch,
> HBASE-13427_CURLY_BRACES.patch, HBASE-13427_V3.patch,
> SetFromMap.add_Runnable.tiff, perftest.hstore.changedReadObserver.txt
>
> Original Estimate: 2h
> Time Spent: 2h
> Remaining Estimate: 0h
>
> Please see attached graph...
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