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Re: Issue with index in OpenLDAP?

Hello Quanah,

First I would like to thank you for your answer.

Indeed, I also think that the "cardnumber" index is somehow corrupted. His size is to small in comparison to other indexes

We suppressed all existing index and Used slapindex to re-create them all.

It's undergoing.

I will keep you informed about the solution.

Best Regards,


2012/1/3 Quanah Gibson-Mount <quanah@zimbra.com>
--On Friday, December 23, 2011 11:27 AM +0100 "External Mathieu DEDECKER (CAMPUS)" <external.z02mdebe@oxylane.com> wrote:

Hi @All,

We meet a performance problem with our OpenLDAP.

We think that we face a problem with the index of the database, and we
think that the problem can be resolve by tunning the config (but not

We would like to be sure that our configuration is correct, in order to
confirm if we are on a wrong track or not.


We have an attribute (cardNumber) which is indexed.

When we request the indexed attribute (cardNumber) with an LDAP Client
(Ldapbrowser), we have either fast or very long response time.

For the long response time, the CPU of the server hits 100%.

For example:

Request1: cardnumber=2098001010034  (less than 1sec)
Request2: cardnumber=2090389917486  (nearly 20 sec).

By checking the hit ratio of the attribute, we can see that cache is
correctly used (97%).

It sounds like you added an index to cardnumber after there was already data for cardnumber in your database, and didn't run slapindex for that attribute.  Alternatively, your cardnumber.bdb file is corrupted.



Quanah Gibson-Mount
Sr. Member of Technical Staff
Zimbra, Inc
A Division of VMware, Inc.
Zimbra ::  the leader in open source messaging and collaboration