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From "Peter Schuller (JIRA)" <>
Subject [jira] Commented: (CASSANDRA-1968) Increase JVM young generation size
Date Fri, 21 Jan 2011 08:29:44 GMT


Peter Schuller commented on CASSANDRA-1968:

Anyone got a good feel for how much pause times will be affected after long-time use? WIth
a fixed new size, I'm a bit paranoid about pause times creeping up as young gen becomes more
fragmented etc. However I'm not up enough on how CMS old-gen is managed to know whether this
is an expected result.

> Increase JVM young generation size
> ----------------------------------
>                 Key: CASSANDRA-1968
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>    Affects Versions: 0.7.0
>            Reporter: Brandon Williams
>            Assignee: Brandon Williams
>             Fix For: 0.7.1
>         Attachments: 1968.txt, 1968_v2.txt
>   Original Estimate: 4h
>  Remaining Estimate: 4h
> Increasing the young generation size has a profound effect on performance and cpu utilization.
 We should set it explicitly.

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