Varun Sharma created HBASE-8370:
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Summary: Report data block cache hit rates apart from aggregate
cache hit rates
Key: HBASE-8370
URL: https://issues.apache.org/jira/browse/HBASE-8370
Project: HBase
Issue Type: Improvement
Reporter: Varun Sharma
Priority: Minor
Attaching from mail to [email protected]
I am wondering whether the HBase cachingHitRatio metrics that the region server
UI shows, can get me a break down by data blocks. I always see this number to
be very high and that could be exagerated by the fact that each lookup hits the
index blocks and bloom filter blocks in the block cache before retrieving the
data block. This could be artificially bloating up the cache hit ratio.
Assuming the above is correct, do we already have a cache hit ratio for data
blocks alone which is more obscure ? If not, my sense is that it would be
pretty valuable to add one.
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