stack created HBASE-11573:
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Summary: 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
>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).
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