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Re: slow or inconsistent syncrepl


I see that I'm outdated in my tuning as per http://wiki.zimbra.com/wiki/OpenLDAP_Performance_Tuning.
I'll do these changes and observe the servers.

In the mean time a new observation regarding syncrepl is that if I do ldapmodify for 5 - 10 entries in one go the changes get replicated but if I change about 300 entries in one go, then some entries do not get replicated on some servers. These changes dont get replicated until I change those entries again.

Does this indicate provider resource problem or consumer resource problem ( or normal behaviour ) ?



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----- Original Message -----

From: Quanah Gibson-Mount

Sent: 03/11/12 02:05 AM

To: Amol Kulkarni, Howard Chu

Subject: Re: slow or inconsistent syncrepl


 
--On Saturday, March 10, 2012 2:34 PM +0100 Amol Kulkarni 
<amolkulkarni@gmx.com> wrote: 

> 
> 
>>> That depends entirely on the speed of your server and network. 
> 
> Taking the server part first - I'm also doubt that my provider server is 
> underpowered. 
> 
> Following are the ldap specific parameters on our provider server : 
> 
> entries : 0.5 million 
> avg entry size : 1k to 4k 
> cachesize : 0.5 million 
> dncachesize : 0.5 million 
> database type : bdb 
> bdb cachesize : 3 gb 
> ldap threads : 16 
> 
> Foll is hardware configuration of the provider server : 
> ram : 8gb 
> swap : 8gb 
> cpu :  Virtual machine with 4 cpus. (vmware vsphere) 
> architecture : 64 bit 
> 
> Also we have some administrative services/tasks running on the provider 
> server other than openldap. But the sar output seems normal i.e iowait 
> below 10 and idle time above 50. 
> 
> Does the hardware configuration seem ok for the given ldap size and 
> configuration ? 
> 
> If not, can u suggest some changes? 

You don't provide any useful information for suggesting changes.  I would 
advise you read over 
<http://wiki.zimbra.com/wiki/OpenLDAP_Performance_Tuning> 

-- 

Quanah Gibson-Mount 
Sr. Member of Technical Staff 
Zimbra, Inc 
A Division of VMware, Inc. 
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