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https://issues.apache.org/jira/browse/OOZIE-157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13101909#comment-13101909
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Hadoop QA commented on OOZIE-157:
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mislam77 remarked:
Closed by 4f3ff42e2994d9cb64b42e4f58371f491e644164 Oozie uses excessive memory
when doing purging
> GH-141: Oozie uses excessive memory when doing purging
> ------------------------------------------------------
>
> Key: OOZIE-157
> URL: https://issues.apache.org/jira/browse/OOZIE-157
> Project: Oozie
> Issue Type: Bug
> Reporter: Hadoop QA
>
> When there are many coordinator jobs/actions eligible for purge, Oozie
> becomes a memory hog when purging these jobs/actions. Oozie will purge
> coordinator actions first then coordinator jobs within one transaction. First
> we delete some actions and then we have select count queries on actions, this
> causes OpenJPA to create a large number of CoordinatorActionBean objects -
> eating up lots of memory.
> To fix this, we need to have two transactions, one for deleting actions and
> one for deleting jobs. Then we will not run into this scenario where you have
> select count queries on some table with uncommitted changes.
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