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Posted to commits@cassandra.apache.org by "Quentin Conner (JIRA)" <ji...@apache.org> on 2013/11/20 17:57:35 UTC

[jira] [Created] (CASSANDRA-6386) FD mean calculation performance improvement

Quentin Conner created CASSANDRA-6386:
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             Summary: FD mean calculation performance improvement
                 Key: CASSANDRA-6386
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6386
             Project: Cassandra
          Issue Type: Bug
            Reporter: Quentin Conner


CPU profiling in #6127 found the o.a.c.gms.arrrivalWindow.mean() calculation taking the most cpu time during steady state gossip.

cpu usage can be a limiting factor when starting > 500 nodes concurrently, which customers sometimes do (though we suggest starting nodes 2 or 3 minutes apart).




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