We've followed the guide at http://www.openldap.org/doc/admin24/tuning.html#Berkeley it is important to say that the guide is for older versions, and that some parameters have a different name, but the meaning is the same.
The parameters that we've changed, with an ldif modify format, are:
----------------------------------------------------------------------------------------- dn: olcDatabase={1}hdb, cn=config changetype: modify replace: olcDbCheckpoint olcDbCheckpoint: 1024 5 - replace: olcDbCacheSize olcDbCacheSize: 45000 - replace: olcDbConfig olcDbConfig: {0}set_cachesize 0 94371840 0 olcDbConfig: {1}set_lk_max_objects 4500 olcDbConfig: {2}set_lk_max_locks 4500 olcDbConfig: {3}set_lk_max_lockers 4500 - replace: olcDbIDLcacheSize olcDbIDLcacheSize: 135000 -----------------------------------------------------------------------------------------
We have around 35,000 entries, with the following BDB sizes:
5.7M dn2id.bdb 85M id2entry.bdb
You should consider the amount of RAM available.
If we could help you with anything else please let us know.
Regards.
2009/12/8 Bad Guy badguy9588@hotmail.com:
Hi,
Can you tell me what tunning to BDB and Openldap cache values ?
What did you modify ?
Thanks
Date: Mon, 7 Dec 2009 18:48:26 -0600 Subject: Re: 100% CPU loading From: alex.leyva@gmail.com To: michael@stroeder.com CC: badguy9588@hotmail.com; openldap-technical@openldap.org
We have a 11 ways MMR. With versions < 2.4.15 we've seen high CPU usage, after an upgrade to 2.4.15 and some tunning to BDB and OpenLDAP cache values the CPU usage is normal again (5-10%).
2009/12/7 Michael Stro"der michael@stroeder.com:
Bad Guy wrote:
We have been setup a 4 ways multi-master replication openldap version 2.4.11.
It has been running for a year.
However, recently, we find that one of the server has 100% high CPU and all the replication can't be replicated to that server.
There have been numerous fixes to OpenLDAP 2.4.x release series related to multi-master replication. You should seriously consider to upgrade.
Ciao, Michael.
Windows 7：找出適合您的電腦。 深入了解。