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Posted to dev@directory.apache.org by "Emmanuel Lecharny (JIRA)" <ji...@apache.org> on 2007/09/20 11:44:31 UTC
[jira] Updated: (DIRSERVER-1049) [PERF] Speed improvement in Search
operation
[ https://issues.apache.org/jira/browse/DIRSERVER-1049?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Emmanuel Lecharny updated DIRSERVER-1049:
-----------------------------------------
Issue Type: Improvement (was: Bug)
Summary: [PERF] Speed improvement in Search operation (was: Speed improvement in Search operation)
This is not a bug.
Added a tag in the subject to be able to find all the PERF issues quickly
> [PERF] Speed improvement in Search operation
> --------------------------------------------
>
> Key: DIRSERVER-1049
> URL: https://issues.apache.org/jira/browse/DIRSERVER-1049
> Project: Directory ApacheDS
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.5.1
> Reporter: Emmanuel Lecharny
> Fix For: 1.5.2
>
>
> A search operation based on a single attribute, like (uid=user.123), should not pass through the optimizer at all, as we don't need to compute the number of entries.
> What we have now is that the search is built as a conjonction (AND) operation as if we have injected this filter :
> (& (objectclass =* ) (uid = user.123))
> The cost of doing such a count is not negligeable (5% of the overall operation)
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