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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-2715) Query Log
Date Mon, 09 Apr 2018 04:16:00 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-2715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16430012#comment-16430012
] 

Josh Elser commented on PHOENIX-2715:
-------------------------------------

Great! I got this working locally with your updated patch. Thanks again, Ankit!

One more thing: did we discuss at some point about not logging system table queries? I'm noticing
that I get ~4 entries in system.log for every one query I run in sqlline against a user table.

I think making a quick pass to ensure some good Interfaces exist should be done before an
initial commit. It would be nice to see the sampling but I think that could be done follow-on
(not sure if Andrew feels strongly one way or the other). Pruning out system table queries
(or maybe having an option to prune them) would be a nice-to-have follow-on – my guess is
that it's hard to identify these queries.

> 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
>         Attachments: PHOENIX-2715.patch, PHOENIX-2715_master.patch, PHOENIX-2715_master_V1.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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