How can I fine tune the performance of my IMS5.1 mailserver?

I installed the IMS5.1 on Solaris 8 with default parameters, without IDA. It is used as a mail relay. It seems to have/keep about 700 msgs in the tcp_local channel but none in the process channel. It uses the cpu very much, in my opinion too much (100% is no exception. It uses the swap file for only 30%. How can I tune the performance of my system. Don't laugh: the "server" is only a SUN Ultra 5 workstation.

I've been working with this MTA since '95. Unfortunately there is no easy answer. The number of msgs in queue is not an indication of performance, it can be, but it can also be that the hosts your system is trying to reach are not available. You can use tools like imsimta qtop to see top subjects or top domains. Poke around and see just why you have 700 msgs in your queues.
Channels like process or say conversion channel are internal while channnels like tcp_local deal with external systems. If you had mail backing up in the conversion channel then you'd have a good sign of local performance problems. Mail backing up in tcp_local is not necessarily a sign of performance problems on your end.
I don't see a problem with the software using all available CPU. What is wrong with that?
If you've made any changes to the configuration it could be that you have introduced something that is causing say a mapping process to loop and thus eat more CPU that would otherwise be normal.
What process is using all of this CPU? Knowing this would help to determine what part of the MTA might be using lots of CPU.

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Message was edited by: jagadeep sampath

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How can I fine tune the performance of my IMS5.1 mailserver?

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