Robert Yokota created HBASE-18559:
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Summary: Provide metrics for concurrent calls per server to be
able to effectively use new config setting from HBASE-16388
Key: HBASE-18559
URL: https://issues.apache.org/jira/browse/HBASE-18559
Project: HBase
Issue Type: Improvement
Components: Client
Reporter: Robert Yokota
Priority: Minor
HBASE-16388 introduced a new configuration setting
"hbase.client.perserver.requests.threshold " to deal with slow region servers.
I have back-ported the code for the new config setting to our environment, but
I don't feel comfortable setting it in production without visibility into how
the number of concurrent calls per server varies (especially the current high
water mark or max in production when the cluster is healthy).
It is straightforward to pass the value for the concurrent calls per server to
a new histogram in MetricsConnection. I will attach a patch that I am using to
gain a better understanding of how setting
"hbase.client.perserver.requests.threshold" will affect our production
environment.
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