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https://issues.apache.org/jira/browse/HBASE-15643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15373693#comment-15373693
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Enis Soztutar commented on HBASE-15643:
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Agreed. [~aliciashu] did some experiments with ycsb loading, and there was a
perf hit about 3% of so. We were discussing offline about a way to carry the
metrics reference in the HRegion itself where it is initialized once per region
lifecycle, and pass it down to the HFileBlockKey to get rid of the map lookup.
I think she will prototype the approach to see whether it works or not.
> Need metrics of cache hit ratio, etc for one table
> --------------------------------------------------
>
> Key: HBASE-15643
> URL: https://issues.apache.org/jira/browse/HBASE-15643
> Project: HBase
> Issue Type: Improvement
> Reporter: Heng Chen
> Assignee: Alicia Ying Shu
> Attachments: HBASE-15643.patch
>
>
> There are many tables on our cluster, only some of them need to be read
> online.
> We could improve the performance of read by cache, but we need some metrics
> for it at table level. There are a few we can collect: BlockCacheCount,
> BlockCacheSize, BlockCacheHitCount, BlockCacheMissCount, BlockCacheHitPercent
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