ability to record the block cache hit ratio for the last few minutes
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Key: HBASE-3632
URL: https://issues.apache.org/jira/browse/HBASE-3632
Project: HBase
Issue Type: Improvement
Components: regionserver
Reporter: dhruba borthakur
Assignee: dhruba borthakur
In the curent code, the block cache hit ratio is calculated by using the total
number of cache hits since the regin server was rebooted. This means that this
metric does not reflect the short term changes that occur in the workload; the
longer the region reserver is alive slower is the rate of change of this
metric.
I propose that this metric reflect the cache hit ratio for the work processed
in the most recent 10 minutes, is that reasonable?
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