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https://issues.apache.org/jira/browse/IMPALA-7446?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong resolved IMPALA-7446.
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Resolution: Fixed
Fix Version/s: Impala 3.2.0
> Queries can spill earlier than necessary because of accumulation of free
> buffers and clean pages
> ------------------------------------------------------------------------------------------------
>
> Key: IMPALA-7446
> URL: https://issues.apache.org/jira/browse/IMPALA-7446
> Project: IMPALA
> Issue Type: Bug
> Components: Backend
> Affects Versions: Impala 2.10.0, Impala 2.11.0, Impala 3.0, Impala 2.12.0
> Reporter: Tim Armstrong
> Assignee: Tim Armstrong
> Priority: Critical
> Labels: resource-management
> Fix For: Impala 3.2.0
>
>
> See IMPALA-7442 for an example where the query started to spill even when
> memory could have been made available by freeing buffers or evicting clean
> pages. Usually this would just result in spilling earlier than necessary, but
> in the case of IMPALA-7442 it lead to a query failure.
> My original intent was that BufferPool::ReleaseMemory() should be called in
> situations like this, but that was not done.
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