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James Taylor edited comment on PHOENIX-4718 at 4/30/18 10:46 PM: ----------------------------------------------------------------- Please review, [~tdsilva]. Instead of always tracking memory used by an Aggregator, we only do it if we're using an Aggregator in which trackSize() returns true. [~mujtabachohan] - can you try with this patch and see if perf is better again? Let me attach an 0.98 version of this patch, though. was (Author: jamestaylor): Please review, [~tdsilva]. Instead of always tracking memory used by an Aggregator, we only do it if we're using an Aggregator in which trackSize() returns true. [~mujtabachohan] - can you try with this patch and see if perf is better again? > Decrease overhead of tracking aggregate heap size > ------------------------------------------------- > > Key: PHOENIX-4718 > URL: https://issues.apache.org/jira/browse/PHOENIX-4718 > Project: Phoenix > Issue Type: Bug > Reporter: James Taylor > Assignee: James Taylor > Priority: Major > Attachments: PHOENIX-4718.patch > > > Since PHOENIX-4148, we track the heap size while aggregation is occurring. > This decreased performance of aggregation by ~20%. We really only need to > track this for the DistinctValueWithCountServerAggregator (used by DISTINCT > COUNT, DISTINCT, PERCENTILE functions, and STDDEV functions). By > conditionally tracking, we should be able to bring perf back to what it was > before. -- This message was sent by Atlassian JIRA (v7.6.3#76005)