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https://issues.apache.org/jira/browse/SPARK-17231?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Allman updated SPARK-17231:
-----------------------------------
Description:
While debugging the performance of a large GraphX connected components
computation, I found several places in the `network-common` and
`network-shuffle` code bases where trace or debug log messages are constructed
even if the respective log level is disabled. Refactoring the respective code
to avoid these constructions except where necessary led to a modest but
measurable reduction in task time, GC time and the ratio thereof.
(PR to follow.)
was:
While debugging the performance of a large GraphX connected components
computation, I found several places in the `network-common` and
`network-shuffle` code bases where trace or debug log messages are constructed
even if the respective log level is disabled. Refactoring the respective code
to avoid these constructions except where necessary led to a modest but
measurable reduction in task time, GC time and the ratio thereof.
(Before and after executor stats to follow in screenshots.)
(PR to follow.)
> Avoid building debug or trace log messages unless the respective log level is
> enabled
> -------------------------------------------------------------------------------------
>
> Key: SPARK-17231
> URL: https://issues.apache.org/jira/browse/SPARK-17231
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.0.0
> Environment: Spark cluster with 8 r3.8xl EC2 worker instances
> Reporter: Michael Allman
> Priority: Minor
> Attachments: logging_perf_improvements.jpg, master.jpg
>
>
> While debugging the performance of a large GraphX connected components
> computation, I found several places in the `network-common` and
> `network-shuffle` code bases where trace or debug log messages are
> constructed even if the respective log level is disabled. Refactoring the
> respective code to avoid these constructions except where necessary led to a
> modest but measurable reduction in task time, GC time and the ratio thereof.
> (PR to follow.)
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