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Posted to commits@cassandra.apache.org by "Xu Zhongxing (JIRA)" <ji...@apache.org> on 2015/10/24 17:51:27 UTC

[jira] [Created] (CASSANDRA-10588) Large number of tables increases the cpu usage during idle time

Xu Zhongxing created CASSANDRA-10588:
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             Summary: Large number of tables increases the cpu usage during idle time
                 Key: CASSANDRA-10588
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10588
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Xu Zhongxing
            Priority: Minor


When the database is empty, the idle time cpu usage of Cassandra is around 2%. But after I created 1500 tables, the cpu usage increases to 10%.
I checked with top -H and jstack and found two metric-meter-tick threads both consumes around 5% cpu.

If I remove all 1500 tables, the cpu usage decreases.

Is this a problem or is an inherent design property of Cassandra?



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