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https://issues.apache.org/jira/browse/HBASE-11544?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Lawlor updated HBASE-11544:
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Attachment: HBASE-11544-v7.patch
Attaching patch that has been rebased to master
While investigating potential causes of increased mean time I noticed a small
bug where NextState.NO_MORE_VALUES was being returned from KeyValueHeap#next()
inappropriately (didn't cause issues because users of this state weren't
actually using this state, just the Results returns from the call). This bug
has been corrected in this patch but will not provide any performance increase.
Let's put it through a final QA run to make sure this fix hasn't created any
new issues. I will fill out the release notes shortly
> [Ergonomics] hbase.client.scanner.caching is dogged and will try to return
> batch even if it means OOME
> ------------------------------------------------------------------------------------------------------
>
> Key: HBASE-11544
> URL: https://issues.apache.org/jira/browse/HBASE-11544
> Project: HBase
> Issue Type: Bug
> Reporter: stack
> Assignee: Jonathan Lawlor
> Priority: Critical
> Labels: beginner
> Attachments: HBASE-11544-branch_1_0-v1.patch,
> HBASE-11544-branch_1_0-v2.patch, HBASE-11544-v1.patch, HBASE-11544-v2.patch,
> HBASE-11544-v3.patch, HBASE-11544-v4.patch, HBASE-11544-v5.patch,
> HBASE-11544-v6.patch, HBASE-11544-v6.patch, HBASE-11544-v6.patch,
> HBASE-11544-v7.patch, gc.j.png, hits.j.png, mean.png, net.j.png
>
>
> Running some tests, I set hbase.client.scanner.caching=1000. Dataset has
> large cells. I kept OOME'ing.
> Serverside, we should measure how much we've accumulated and return to the
> client whatever we've gathered once we pass out a certain size threshold
> rather than keep accumulating till we OOME.
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