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From "Alex Behm (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-3316: [DOCS] Add known issue for timezone conversion slowdown
Date Fri, 29 Sep 2017 00:50:25 GMT
Alex Behm has posted comments on this change. ( http://gerrit.cloudera.org:8080/8165 )

Change subject: IMPALA-3316: [DOCS] Add known issue for timezone conversion slowdown
......................................................................


Patch Set 1:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/8165/1/docs/topics/impala_known_issues.xml
File docs/topics/impala_known_issues.xml:

http://gerrit.cloudera.org:8080/#/c/8165/1/docs/topics/impala_known_issues.xml@316
PS1, Line 316:           such as the number of cores and number of threads involved in the
query.
State explicitly that slowdowns of up to 30x have been observed for scan-heavy queries. I
think that was ultimately the ask of the users.

I think it's also important to re-iterate that the setting only has effect for files generated
by Hive. For Impala generated files this setting has no effect or slowdown.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I9933ced07e339d589f7f74173cfebe938084e65c
Gerrit-Change-Number: 8165
Gerrit-PatchSet: 1
Gerrit-Owner: John Russell <jrussell@cloudera.com>
Gerrit-Reviewer: Alex Behm <alex.behm@cloudera.com>
Gerrit-Reviewer: Attila Jeges <attilaj@cloudera.com>
Gerrit-Reviewer: Mostafa Mokhtar <mmokhtar@cloudera.com>
Gerrit-Comment-Date: Fri, 29 Sep 2017 00:50:25 +0000
Gerrit-HasComments: Yes

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