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From "Emmanuel Lecharny (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DIRSERVER-1049) [PERF] Speed improvement in Search operation
Date Thu, 15 Aug 2013 01:20:48 GMT

     [ https://issues.apache.org/jira/browse/DIRSERVER-1049?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Emmanuel Lecharny updated DIRSERVER-1049:
-----------------------------------------

    Fix Version/s:     (was: 2.0.0-RC2)
                   2.0.0-M15
    
> [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: 2.0.0-M15
>
>
> 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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