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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-5602) Add cache access pattern statistics and report hot blocks/keys
Date Sat, 11 Apr 2015 01:21:13 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5602?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell resolved HBASE-5602.
-----------------------------------
    Resolution: Incomplete

> Add cache access pattern statistics and report hot blocks/keys
> --------------------------------------------------------------
>
>                 Key: HBASE-5602
>                 URL: https://issues.apache.org/jira/browse/HBASE-5602
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Mikhail Bautin
>
> In many practical applications it would be very useful to know how well utilized the
block cache is, i.e. how many times we actually access a block once it gets into cache. This
would also allow to evaluate cache-on-write on flush. In addition, we need to keep track of
and report some set of hottest block in cache, and possibly even hottest keys. This would
allow to diagnose "hot-row" problems in real time.



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