[Samba] [Samba 4.5] Very slow LDAP Queries (almost unusable), performance tunning ?

Andrew Bartlett abartlet at samba.org
Wed Apr 5 04:40:27 UTC 2017

On Thu, 2017-03-23 at 11:12 +0100, Gaetan SLONGO via samba wrote:
> Dear users, 
> We are facing to a big latency issue regarding the LDAP Server (both
> encrypted & plain). 
> We have a Zarafa mail server which makes a lot of queries and puts a
> samba process to 100% usage. This latency makes the mail server
> unusable.. The mail server was previously on OpenLDAP and there was
> not performance issues. 
> A simple LDAP query can take up to 25 sec to perform !! 

Can you or others who use this please give the attached patch (on git
master) a try?

We fix a major locking issue that makes our searches slow, and provide
multi-process support.


Andrew Bartlett

Andrew Bartlett
Authentication Developer, Samba Team         https://samba.org
Samba Development and Support, Catalyst IT   

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