Re: Maximum size of the database.

[Howard Chu <hyc@symas.com>]

Sumith Narayanan wrote:
> Hi Group,
>
> We have a coorporate openldap database in production which has more
> than 4 million entries. The slapd process serves three different
> physical dabases of sizes 4 GB , 12 GB and 24 GB respecievely.
> Earlier it was runnning in ldab backend and was crashing once in 3 -4
> days. We upgraded to OpenLDAP 2.3.27 and BDB backend 4.4.20. Mac OS
> Tiger with 4GB RAM in the master and 8 GB ram in the slave. Now it
> crashes often may be couple of times in a day or sometimes once in 2
> days. There is nothing much written in the log files but at times it
> shows out of memory exception. However , the search performance is
> still good.
>
>
> - What is the maximum size of the database that OpenLDAP can support ?
> - What is the maxmum number of dns it can hold ?
> - Is there any solution for the above problem ?

For a machine with 4GB of RAM I think it will max out at around 1-2 million 
DNs. Unfortunately there is no way to control the size of the DN cache in 
OpenLDAP 2.3, it simply grows without bound. A config keyword for the DN cache 
will be in OpenLDAP 2.4.
--
  -- Howard Chu
  Chief Architect, Symas Corp.  http://www.symas.com
  Director, Highland Sun        http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP     http://www.openldap.org/project/