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From "Emmanuel Lecharny (JIRA)" <>
Subject [jira] Updated: (DIRSERVER-1049) [PERF] Speed improvement in Search operation
Date Thu, 20 Sep 2007 09:44:31 GMT


Emmanuel Lecharny updated DIRSERVER-1049:

    Issue Type: Improvement  (was: Bug)
       Summary: [PERF] Speed improvement in Search operation  (was: Speed improvement in Search

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:
>             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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