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https://issues.apache.org/jira/browse/HBASE-12116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14152914#comment-14152914
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stack edited comment on HBASE-12116 at 9/30/14 7:54 AM:
--------------------------------------------------------
Some small items of contention; cache the max row size so we don't look it up
each time which is contentious when lots of threads reading and then stringify
exception has us resizing backing array repeatedly which shows in the sampling
window I ran because many NSREs going on.
was (Author: stack):
Some small items of contention; cache the max row size so we don't look it up
each time which is contentious when lots of threads reading and then stringify
exception has us resizing backing array repeatedly.
> Hot contention spots; writing
> -----------------------------
>
> Key: HBASE-12116
> URL: https://issues.apache.org/jira/browse/HBASE-12116
> Project: HBase
> Issue Type: Bug
> Reporter: stack
> Assignee: stack
> Attachments: 12116.stringify.and.cache.scanner.maxsize.txt, Screen
> Shot 2014-09-29 at 5.12.51 PM.png
>
>
> Playing with flight recorder, here are some write-time contentious
> synchronizations/locks (picture coming)
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