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From "Kristian Waagan (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5445) Enhance existing concurrency test to stress sequence generators to also stress identity columns
Date Wed, 05 Oct 2011 20:34:29 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13121447#comment-13121447

Kristian Waagan commented on DERBY-5445:

Every day?
See http://home.online.no/~olmsan/derby/perf/ , accessible from http://dbtg.foundry.sun.com/derby/test/

Since the results don't make sense without comparing them over time (on the same hardware,
os, JVM, etc), I don't think they're well suited for running as part of suite.All. Note also
that the results can be rather unstable, so to draw conclusions one has to look at the numbers
for a longer period of time.
I don't know if there are any other performance test comparing performance over time for Derby.
> Enhance existing concurrency test to stress sequence generators to also stress identity
> -----------------------------------------------------------------------------------------------
>                 Key: DERBY-5445
>                 URL: https://issues.apache.org/jira/browse/DERBY-5445
>             Project: Derby
>          Issue Type: Task
>          Components: Test
>    Affects Versions:,
>            Reporter: Mamta A. Satoor
>            Assignee: Mamta A. Satoor
> DERBY-4565 added a concurrency test for sequence generators to test the possible race
condition for allocating a new range of pre-allocated numbers for the sequence. I have been
looking at enhancing that test to provide similar test for identity columns. I plan to add
another command line parameter to the test which will run the concurrency test to stress identity
column generator.

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