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From "Bryan Pendleton (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-3259) Tuning manual needs performance tip on compressing tables
Date Wed, 13 Jan 2010 00:38:54 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3259?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Bryan Pendleton updated DERBY-3259:

    Attachment: docs.diff

Hi Kim, thanks for the review and good suggestions. I think I've incorporated
them into the latest attached patch proposal, and have also attached the
updated HTML versions of  the "Ensure statistics are accurate" and 
"When statistics go stale" topics.

> Tuning manual needs performance tip on compressing tables
> ---------------------------------------------------------
>                 Key: DERBY-3259
>                 URL: https://issues.apache.org/jira/browse/DERBY-3259
>             Project: Derby
>          Issue Type: Improvement
>          Components: Documentation
>    Affects Versions:
>            Reporter: Kim Haase
>            Assignee: Bryan Pendleton
>         Attachments: ctunperf25864.html, ctunperfstatistics.html, ctunperfstatistics.html,
ctunstats849505.html, ctunstats849505.html, docs.diff, docs.diff
> The "Performance Tips and Tricks" section of the Tuning Derby manual needs a topic that
recommends the use of the SYSCS_UTIL.SYSCS_COMPRESS_TABLE procedure to resolve performance
problems having to do with indexes and complex table joins. (Please rephrase this if I haven't
put it correctly.)
> For details, see the discussion at http://www.nabble.com/Re%3A-FW%3A-Advice-on-*very*-badly-performing-query-tf4939807.html.

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