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https://issues.apache.org/jira/browse/HBASE-15162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yu Li updated HBASE-15162:
--------------------------
Attachment: HBASE-15162.patch
Attaching the initial patch. Note that this patch depends on HBASE-15161 so
could not directly apply on current code base.
Some data after patch:
{noformat}
"blockCacheExpressHitPercent" : 77,
"blockCacheExpressMetaHitPercent" : 83,
"blockCacheExpressDataHitPercent" : 66,
{noformat}
> 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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