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https://issues.apache.org/jira/browse/BEAM-7906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16901565#comment-16901565
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Pablo Estrada commented on BEAM-7906:
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List of PRs merged in this 29-30 of July:
https://github.com/apache/beam/pulls?utf8=✓&q=is%3Apr+is%3Aclosed+merged%3A2019-07-29..2019-07-30
> Perf regression in SQL Query3 in Dataflow
> -----------------------------------------
>
> Key: BEAM-7906
> URL: https://issues.apache.org/jira/browse/BEAM-7906
> Project: Beam
> Issue Type: Bug
> Components: dsl-sql, runner-dataflow
> Reporter: Anton Kedin
> Priority: Blocker
> Fix For: 2.15.0
>
> Attachments: dataflow.png, direct.png
>
>
> Nexmark shows perf regression in SQL Query3 starting on July 30 2019:
> https://apache-beam-testing.appspot.com/explore?dashboard=5670405876482048
> There doesn't seem to be a lot of changes to SQL around that date and the one
> that was there doesn't seem relevan to the query:
> https://github.com/apache/beam/commits/master/sdks/java/extensions/sql
> Direct runner shows a slight perf decrease as well:
> https://apache-beam-testing.appspot.com/explore?dashboard=5084698770407424
> while Spark runner doesn't:
> https://apache-beam-testing.appspot.com/explore?dashboard=5138380291571712
> The query in question is a join with a simple filter condition:
> https://github.com/apache/beam/blob/b8aa8486f336df6fc9cf581f29040194edad3b87/sdks/java/testing/nexmark/src/main/java/org/apache/beam/sdk/nexmark/queries/sql/SqlQuery3.java#L69
> Other queries don't seem to be affected
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