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https://issues.apache.org/jira/browse/IMPALA-9919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17152112#comment-17152112
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Tim Armstrong commented on IMPALA-9919:
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IMPALA-6792 actually is probably contributing to the memory leak.
> Bad Impala Performance after a period of time
> ---------------------------------------------
>
> Key: IMPALA-9919
> URL: https://issues.apache.org/jira/browse/IMPALA-9919
> Project: IMPALA
> Issue Type: Bug
> Components: Backend
> Affects Versions: Impala 2.10.0
> Environment: OS: CentOS 6.9
> Reporter: Vagelis Nomikos
> Priority: Major
> Labels: performance
>
> Our cluster is consisting of about 60 Impala nodes. After a period of time
> and after executing some "heavy" queries the performance of the cluster
> becomes bad and the Impala is not responding after a period of time. We
> observed that day after day the Impala Resident memory and the running
> threads of the machine keep growing even if we do not run queries. Everytime
> we perform an Impala restart everything seems to work fine for a period of
> time.
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