stack created HBASE-15967:
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Summary: Metric for active ipc Readers and make default fraction
of cpu count
Key: HBASE-15967
URL: https://issues.apache.org/jira/browse/HBASE-15967
Project: HBase
Issue Type: Sub-task
Reporter: stack
Assignee: stack
Our ipc Readers are hard coded at 10 regardless since . Running w/ less
Readers, we go faster..(e.g. 12 Readers has us doing 135k with workloadc and 6
readers has us doing 145k).. .but hard to tell what count of Readers are needed
since no metric.
This issue changes Readers to be 1/4 the installed CPUs or 8, whichever is the
minimum, and then adds a new hbase.regionserver.ipc.runningReaders metric so
you have a chance seeing whats needed.
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