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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (PHOENIX-2715) Query Log
Date Fri, 25 May 2018 02:58:00 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-2715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16490153#comment-16490153
] 

Lars Hofhansl edited comment on PHOENIX-2715 at 5/25/18 2:57 AM:
-----------------------------------------------------------------

The default is supposed to the OFF, right?

I just tried with a vanilla build from Phoenix' master branch and I see SYSTEM.LOG is being
written to.

Looking at the code I see the default *is* OFF, so something is not working right, unless
I misunderstood something.

Everything but OFF is a bad default, IMHO.

[~ankit@apache.org]


was (Author: lhofhansl):
The default is supposed to the OFF, right?

I just true with a vanilla build from Phoenix' master branch and I see SYSTEM.LOG is being
written to.

Looking at the code I see the default *is* OFF, so something is not working right, unless
I misunderstood something.

Everything but OFF is a bad default, IMHO.

[~ankit@apache.org]

> Query Log
> ---------
>
>                 Key: PHOENIX-2715
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-2715
>             Project: Phoenix
>          Issue Type: New Feature
>            Reporter: Nick Dimiduk
>            Assignee: Ankit Singhal
>            Priority: Major
>             Fix For: 4.14.0, 5.0.0
>
>         Attachments: PHOENIX-2715.patch, PHOENIX-2715_master.patch, PHOENIX-2715_master_V1.patch,
PHOENIX-2715_master_V2.patch
>
>
> One useful feature of other database systems is the query log. It allows the DBA to review
the queries run, who's run them, time taken, &c. This serves both as an audit and also
as a source of "ground truth" for performance optimization. For instance, which columns should
be indexed. It may also serve as the foundation for automated performance recommendations/actions.
> What queries are being run is the first piece. Have this data tied into tracing results
and perhaps client-side metrics (PHOENIX-1819) becomes very useful.
> This might take the form of clients writing data to a new system table, but other implementation
suggestions are welcome.



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