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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (ACCUMULO-798) large ParNew can cause long-term stop-the-world java GC
Date Wed, 10 Oct 2012 19:45:02 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-798?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eric Newton resolved ACCUMULO-798.
----------------------------------

    Resolution: Fixed

fixed in r1396758 for 1.4 and r1396760 in 1.5 (trunk)
                
> large ParNew can cause long-term stop-the-world java GC
> -------------------------------------------------------
>
>                 Key: ACCUMULO-798
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-798
>             Project: Accumulo
>          Issue Type: Bug
>          Components: tserver
>    Affects Versions: 1.4.1
>         Environment: running a tserver with a very large memory foot-print (16G)
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>            Priority: Trivial
>             Fix For: 1.4.2
>
>
> While running a tserver with 16G of JVM memory, under continuous ingest, a ParNew collection
took longer than 40 seconds.  This happened on two different servers (out of 40) after performing
continuous ingest for more than 20 hours.
> Limiting the ParNew generation to 2G, and never saw this failure again.
> Recommend this setting in the examples, even though none of the examples approaches this
memory size.

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