[ https://issues.apache.org/jira/browse/HBASE-11573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HBASE-11573: -------------------------- Attachment: 11573v3.txt Thanks [~ndimiduk]. I'll take that as a +1. v3 changes age to seconds from ms. > Report age on eviction > ---------------------- > > Key: HBASE-11573 > URL: https://issues.apache.org/jira/browse/HBASE-11573 > Project: HBase > Issue Type: Sub-task > Components: BlockCache > Reporter: stack > Assignee: stack > Fix For: 0.99.0, 2.0.0 > > Attachments: 11573.txt, 11573v2.txt, 11573v3.txt, Screen Shot > 2014-07-22 at 5.17.27 PM.png > > > From the parent issue, Todd reminds us of the old Jim Gray '5 minute rule' on > whether to cache. > In master, we were reporting age only it was the inactionable inverse of 'how > long blocks are staying in the cache'. > Let me add to our cache stats a histogram of age on eviction and change the > UI reporting so it is age at eviction (plus stddev). The JSON version has > percentiles (and if wanted, the old age report of age of items in cache). -- This message was sent by Atlassian JIRA (v6.2#6252)