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Re: slapd does not answer in time
--On Thursday, February 21, 2008 3:19 PM +0100 Hans Moser
I have a 4 cpu machine with SLES 9 and OpenLDAP 2.3.35.
This is master to about 65 slaves via syncreplication.
Why do you have 65 slaves? I've yet to really see a need for more than 3-4
slaves unless one has world-wide distributed offices or the like. I would
note the following:
(a) there have been a number of significant fixes to sync replication since
(b) syncrepl is highly intensive. delta-syncrepl is not so intensive for
(c) Using a full refresh instead of doing a slapcat of the master/slapadd
of the slave (or slapcat of an existing slave to add to a slave) is highly
(d) You make no mention of any tuning you may (or may not) have done, via
the DB_CONFIG file for BDB, or the cachesize, idlcachesize, threads, or
indexing for slapd, all of which could directly impact the performance of
(e) I generally advise a setup where the master is isolated to only taking
writes(*), while letting replicas handle the reads.
(*) - Things that need a guaranteed response should use the master.
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