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Re: 100% CPU loading
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.
>> >
>> >
>
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