topic Re: System performance in Operating System - HP-UX

System performance

Keith Floyd — Thu, 17 Aug 2000 13:50:49 GMT

Hi

I have a D-class that is used as mail relay (sendmail) I want to get some stats to use to upgrade it's mem etc.

What is best to use - command line only

Thanks

Steve

Re: System performance

Antoanetta Naghiu — Thu, 17 Aug 2000 13:53:16 GMT

sar.
It is not a command line, but it has a caracter based interface, glance.
vmstat can help as well.
Also, try to logged same stats, (using nettl, for ex.).
Do a search on the forum (HP-UX). There are a few posts about performance. It might help.

Re: System performance

Albert E. Whale, CISSP — Thu, 17 Aug 2000 14:03:44 GMT

Just in case you haven't tried them, the Glance and Measureware tools are also Exceptional at Performance Analysis and Trending.

Although I would suspect that for a Mail Server the largest performance issue will be file handles, Inodes and swap conditions. All of these issues can be observed by vmstat (real-time monitor) and sar (historical monitor).

Hope that helps.

Re: System performance

CHRIS_ANORUO — Thu, 17 Aug 2000 15:36:37 GMT

Try using sar -d(disk check); sar -b(memory); sar -v; sar -M(multiple processors); sar; top; uptime and vmstat. You can check the online manual information on each command.

Re: System performance

Keith Floyd — Fri, 18 Aug 2000 08:43:00 GMT

Thanks for replys

I also realise this is in the wrong TOPIC

Can you supply more info on file handles and why this will affect a mail-server - it is only acting as a relay though, and also it is a primary/secondary DNS server.

Basically I am getting major performance issues..

Keith

Re: System performance

Albert E. Whale, CISSP — Fri, 18 Aug 2000 12:18:26 GMT

Keith,

At first glance I would highly recommned that you tune the Kernel.

Eventhough the Mail Server is only acting as a Relay, the number of Processes, number if Files, Inodes ....

Tune the kernel with a base Tunable Parameter set, I usually select the Monolithic Database Server Tuned Parameter set.

If you give that a try, I'm sure that the server whould operate better. Not withstanding an upgrade of Memory, Disk, Swap and Network Interfaces. But heck, we can work on those items in a future question/update or follow-up.

Hope that helps you out.