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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Closed: (DERBY-5067) Performance regression tests should populate tables before creating indexes
Date Mon, 28 Feb 2011 08:24:36 GMT

     [ https://issues.apache.org/jira/browse/DERBY-5067?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Knut Anders Hatlen closed DERBY-5067.
-------------------------------------


The results seem to have stabilized at the same level as before the enabling of istat. Closing
the issue.

> Performance regression tests should populate tables before creating indexes
> ---------------------------------------------------------------------------
>
>                 Key: DERBY-5067
>                 URL: https://issues.apache.org/jira/browse/DERBY-5067
>             Project: Derby
>          Issue Type: Improvement
>          Components: Test
>    Affects Versions: 10.8.0.0
>            Reporter: Knut Anders Hatlen
>            Assignee: Knut Anders Hatlen
>             Fix For: 10.8.0.0
>
>         Attachments: pk.diff, select.png
>
>
> I've noticed that the results from some of the performance regression tests have become
more unstable the last two weeks. See for example here: http://home.online.no/~olmsan/derby/perf/select_30d.html
> I suspect it's because the automatic index statistics thread is running (the instability
started at about the same time as it was enabled). We should make the test clients create
indexes after the tables have been populated so that the statistics will be up to date and
no work in the background is needed.

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