Yu Li created HBASE-15162:
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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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