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From "Jeff Jirsa (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-10588) Large number of tables increases the cpu usage during idle time
Date Fri, 22 Sep 2017 04:26:00 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-10588?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jeff Jirsa resolved CASSANDRA-10588.
------------------------------------
    Resolution: Won't Fix

This is likely inherent to the design, but even if it's not, there's no indication it's a
bug. After 2 years, without a concrete bug or proposal, I am closing this as won't-fix. If
you believe this is really actionable, please re-open.

> 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
>            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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