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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-5067) Performance regression tests should populate tables before creating indexes
Date Thu, 24 Feb 2011 17:20:39 GMT
Performance regression tests should populate tables before creating indexes
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                 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


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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