[jira] [Commented] (HBASE-15162) Add separate metrics for meta/data block hit ratio in cache

["Yu Li (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-15162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15114941#comment-15114941 ] 

Yu Li commented on HBASE-15162:
-------------------------------

Depends on HBASE-15160, sorry for typo in the last comment

> Add separate metrics for meta/data block hit ratio in cache
> -----------------------------------------------------------
>
>                 Key: HBASE-15162
>                 URL: https://issues.apache.org/jira/browse/HBASE-15162
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Yu Li
>            Assignee: Yu Li
>         Attachments: HBASE-15162.patch
>
>
> Currently we already have a metrics in name of {{blockCacheExpressHitPercent}} to indicate the cache hit ratio. However, since meta block is small and often cached in memory with a high hit ratio, this "mixed" metrics could not show the real data block hit ratio which is more concerned.
> We propose to add two new metrics to show meta and data block cache hit ratio separately, while reserving the old metrics for backward compatibility.



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