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Andrew Purtell commented on HBASE-12116: ---------------------------------------- bq. We has ACL audit on. Thats 2% of CPU according to perf. AccessController? Let's look, but 2-3% of perf is performance to design expectations, so that's actually good > 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.checkForReplicas.txt, > 12116.stringify.and.cache.scanner.maxsize.txt, 12116.txt, Screen Shot > 2014-09-29 at 5.12.51 PM.png, Screen Shot 2014-09-30 at 10.39.34 PM.png, > Screen Shot 2015-04-13 at 2.03.05 PM.png, perf.write3.svg, perf.write4.svg > > > Playing with flight recorder, here are some write-time contentious > synchronizations/locks (picture coming) -- This message was sent by Atlassian JIRA (v6.3.4#6332)