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https://issues.apache.org/jira/browse/SPARK-9693?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Or updated SPARK-9693:
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Summary: Reserve a page in all unsafe operators to avoid starving an
operator (was: Reserve a page in all sorters to avoid starving an operator)
> Reserve a page in all unsafe operators to avoid starving an operator
> --------------------------------------------------------------------
>
> Key: SPARK-9693
> URL: https://issues.apache.org/jira/browse/SPARK-9693
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.5.0
> Reporter: Andrew Or
> Assignee: Andrew Or
> Priority: Critical
>
> Currently we can do up to 3 sorts within a task:
> (1) During the aggregation
> (2) During a sort on the same key
> (3) During the shuffle
> In environments with tight memory restrictions, the first operator may
> acquire so much memory such that the subsequent ones in the same task are
> starved. A simple fix is to reserve at least a page in advance in each of
> these places. The reserved page size need not be the same as the normal page
> size.
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