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From "Yangzheng Bai (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-13854) Cassandra should provide a parameter to completely disable metrics-core
Date Thu, 07 Sep 2017 23:30:00 GMT
Yangzheng Bai created CASSANDRA-13854:
-----------------------------------------

             Summary: Cassandra should provide a parameter to completely disable metrics-core
                 Key: CASSANDRA-13854
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13854
             Project: Cassandra
          Issue Type: Improvement
          Components: Metrics
            Reporter: Yangzheng Bai
            Priority: Minor


We found that Java metrics-core contributes 10%~15% performance impact on some aarch64 systems.
Because metrics update is heavily rely on atomic instructions and the cost of atomic instruction
is one of the bottlenecks which prevents Cassandra scaling up to 64 or more cores.

Because Java metrics-core is only for diagnostic purpose, we suggest there should be a parameter
in cassandra.yaml to completely disable it.



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