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List:       kolab-users
Subject:    OpenLDAP creates very high CPU load during some
From:       Adam Tworkowski <atworkowski () masterfile ! com>
Date:       2005-09-06 14:19:48
Message-ID: 1126016388.9469.18.camel () localhost ! localdomain
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Hi,

Has anyone else had any issues were running ldapsearch, ldapmodify or
slapcat creates high load / mail unavailability?  

I have had an issue on at least four occasions where running one of the
above commands has shot the cpu up from 0.1 to >15 in several minutes.

The first several occasions involved using ldapsearch and ldapmodify.
Until today I had ruled these out (assumed) as poorly formed
ldapsearch/modify queries that cause some sort of race condition.  Today
I had the same issue simply running /kolab/sbin/slapcat.  

I have been rectifying the issue by gracefully shutting down Kolab, then
forcibly killing slapd (/kolab/libexec/openldap/slapd -h ldap://
ldaps://) and then restarting Kolab.

The obvious mitigation is not to run these commands manually during
production hours.  That said, if slapcat causes this condition, is there
a possibility that an action on the web UI will cause the same issue?

Thanks in advance.

-- 
Regards,

Adam Tworkowski, atworkowski@masterfile.com
Systems Administrator, Computer Department
Masterfile Corporation, www.masterfile.com
 

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