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Posted to issues-all@impala.apache.org by "Tim Armstrong (JIRA)" <ji...@apache.org> on 2018/06/14 23:48:00 UTC
[jira] [Assigned] (IMPALA-5604) Document
DISABLE_CODEGEN_ROWS_THRESHOLD
[ https://issues.apache.org/jira/browse/IMPALA-5604?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tim Armstrong reassigned IMPALA-5604:
-------------------------------------
Assignee: Tim Armstrong (was: Alex Rodoni)
> Document DISABLE_CODEGEN_ROWS_THRESHOLD
> ---------------------------------------
>
> Key: IMPALA-5604
> URL: https://issues.apache.org/jira/browse/IMPALA-5604
> Project: IMPALA
> Issue Type: Task
> Components: Docs
> Affects Versions: Impala 2.10.0
> Reporter: Tim Armstrong
> Assignee: Tim Armstrong
> Priority: Major
>
> We just checking in DISABLE_CODEGEN_ROWS_THRESHOLD to master with default value 50,000.
> The option uses the planner's estimates to determine whether to disable codegen for a query based on the maximum number of rows flowing through any part of the query plan.
> It is similar to EXEC_SINGLE_NODE_ROWS_THRESHOLD in behaviour except the threshold is per-node rows instead of total rows.
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