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From "jaanai (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-5169) Query logger is still initialized for each query when the log level is off
Date Sun, 24 Mar 2019 00:38:00 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-5169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16799861#comment-16799861
] 

jaanai commented on PHOENIX-5169:
---------------------------------

[~elserj],  if the query log level is OFF,  all code paths of initializing QueryLogger that
is createQueryLogger shouldn't be executed and only return NO_OP_INSTANCE,  so that the query
path has a shorter code path. WDYT?

> Query logger is still initialized for each query when the log level is off
> --------------------------------------------------------------------------
>
>                 Key: PHOENIX-5169
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-5169
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 5.0.0
>            Reporter: jaanai
>            Assignee: jaanai
>            Priority: Major
>             Fix For: 5.1
>
>         Attachments: PHOENIX-5169-master-v2.patch, PHOENIX-5169-master-v3.patch, PHOENIX-5169-master.patch,
image-2019-02-28-10-05-00-518.png
>
>
> we will still invoke createQueryLogger in PhoenixStatement for each query when query
logger level is OFF, which has significant throughput impacts under multiple threads.
> The below is jstack with the concurrent query:
> !https://gw.alicdn.com/tfscom/TB1HC3bI4TpK1RjSZFMXXbG_VXa.png|width=500,height=400!
>  



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