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Re: rooling replication and many pop3d



On 22/11/2011 15:52, Andy Bennett wrote:
> Hi,
>
>> I enabled replication between two servers with version 2.4.10 cyrus.
>> I set the option for the rolling replication, and it works fine but
>> obviously I have a high CPU load.
>> Unfortunately after 10 minutes of running processes pop3d increasing
>> from 50 to over 200, making the server unusable for customers.
>> Can you tell me why this increase is abnormal?
> Can you use something like 'top' to work out which processes are
> consuming most of the CPU time?

This screenshot of top before  :

http://www.digicolor.net/cyrus/img1.jpg

and after 20 minutes of rooling replication :

http://www.digicolor.net/cyrus/img5.jpg
>
> Can you use something like 'vmstat 1' to show us how much I/O there is
> on the system?

This screenshot of top before  :

http://www.digicolor.net/cyrus/img3.jpg

and after 20 minutes of rooling replication :

http://www.digicolor.net/cyrus/img6.jpg

>
>
> Are most of the pop3d processes sleeping in iowait?
> Do you use any other servers such as the impad?
Yes I have imapd

This is screenshot of pstree before :

http://www.digicolor.net/cyrus/img2.jpg


This is screenshot of pstree after  :

http://www.digicolor.net/cyrus/img4.jpg

Regards,
Obe.


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Oberdan Albertoni

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