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From "Yu Li (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-15162) Add separate metrics for meta/data block hit ratio in cache
Date Mon, 25 Jan 2016 09:18:39 GMT
Yu Li created HBASE-15162:
-----------------------------

             Summary: 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


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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