Hello John,

On 06/09/08 01:03, John Barry wrote:

Hello,

I am using OpenSER 1.3.0 with digest authentication (MySQL database) in a multiprocessor machine (4 CPU). When using OpenSER configured with one child. I have noticed that OpenSER process can reach a maximum CPU utilization of 70% while the MySQL DB reaches around 30% CPU utilization (100% in total). Tipically the OpenSER process and the MySQL process will be using the same processor. However, this behavior happens also if I forced each processor to use different processors (using processor affinity).

My question is why the OpenSER and the DB processes can't use more CPU time if they are running in independent processors (they behave as if they were running in a single processor). What is the dependency/relationship between the OpenSER and MySQL processes?

openser uses libmysqlclient to connect to mysql server. Usually, the communication is done via a socket file when openser and mysql server are running on the same machine. I see no dependency why they should stick to same processor. What is the operating system you are using? There were reported some performance issues with centos 5.

Cheers, Daniel

Thanks, JB

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