[jira] [Resolved] (IMPALA-9586) Update query option docs to account for interactions with mt_dop

["Tim Armstrong (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-9586?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-9586.
-----------------------------------
    Fix Version/s: Impala 4.0
       Resolution: Fixed

> Update query option docs to account for interactions with mt_dop
> ----------------------------------------------------------------
>
>                 Key: IMPALA-9586
>                 URL: https://issues.apache.org/jira/browse/IMPALA-9586
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Docs
>            Reporter: Tim Armstrong
>            Assignee: Tim Armstrong
>            Priority: Major
>             Fix For: Impala 4.0
>
>
> in some cases mt_dop changes the behaviour of other options or makes them a no-op.  We need to update docs to reflect this.
> * Setting NUM_NODES=1 along with MT_DOP >=1 effectively reduces MT_DOP to 1, i.e. only one thread is used.
> * NUM_SCANNER_THREADS has no effect when MT_DOP>=1
> * Maybe other changes?



--
This message was sent by Atlassian Jira
(v8.3.4#803005)