Re: [Fedora-directory-users] Odd performance problem, server not using indeces

Richard Megginson
Wed, 02 Aug 2006 23:12:07 -0000

George Daswani wrote:
> Hello,
>
>          I have around 350K users in my test directory, and I''m
running
> into an odd problem with the directory not using indeces for
> ldapsearches.
>
> For example, using the following search string
>
> (&(objectClass=organizationalPerson)(employeeNumber=*))
>
> Looking at the console, there''s a system index on objectClass
(which is
> set to equality), there''s also an index on employeeNumber (both
equality,
> and presence).
>
> There are around 5K icasOrgPersons (which can hold the employeeNumber
> attribute), the rest can''t.
How many entries match (objectClass=organizationalPerson)?  If this
number is large, then I think what''s happening is that the database
first looks up how many match this, and says there are too many.  Try
using icasOrgPerson or reverse the order of the filters.
> When the actual search (really slow as if it
> was using a full scan) is performed, the access log files shows
"notes=U"
> meaning that the search was unindexed.  The question is why considering
> there were indeces built for the attributes in the search filter?
>
> Thanks.
>
>
>
>
>
>
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