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Posted to issues@drill.apache.org by "Jinfeng Ni (JIRA)" <ji...@apache.org> on 2016/09/28 18:14:20 UTC
[jira] [Assigned] (DRILL-4911) SimpleParallelizer should avoid plan
serialization for logging purpose when debug logging is not enabled.
[ https://issues.apache.org/jira/browse/DRILL-4911?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jinfeng Ni reassigned DRILL-4911:
---------------------------------
Assignee: Jinfeng Ni
> SimpleParallelizer should avoid plan serialization for logging purpose when debug logging is not enabled.
> ---------------------------------------------------------------------------------------------------------
>
> Key: DRILL-4911
> URL: https://issues.apache.org/jira/browse/DRILL-4911
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Reporter: Jinfeng Ni
> Assignee: Jinfeng Ni
> Priority: Minor
>
> SimpleParallelizer and subclass have code to put serialized plan in debug log. However, in case when the physical plan fragment is very large (table is huge with large # of partitions, files, etc), the overhead of serialization is not negligible. The code seems to always do serialization, regardless whether the debug flag is turned on.
> To reduce the overhead, SimpleParallelizer and subclass should only do plan serialization for logging purpose when debug logging is turned on.
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