Day: <span>December 31, 2015</span>

Day: December 31, 2015

Impala query with GRUOP BY clause failed without disk spilling

This article explains one of the possible reasons that caused Impala query to fail with Out of Memory Exception. The following is the profile from failed query: This query was big, and used more than 60GB of memory, in theory with GROUP BY, Impala should trigger disk spilling when it …

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