Performance Tuning

[Yaboto]

Hi,

The IT department of a bank is complaining about their systems being slow for the last 2 weeks.
They are using an rx2620 server running HP Unix 11.23 as os and T24 ( Globus) as the banking application.
What are the steps I need to take for the resolution of this problem.

Regards,
Berag

[Mel Burslan]

Sorry to be the bearer of the bad news but, first off, you can not get any satisfactory answer to any performance related problem, described as you did, on this forum. OS version is a very small part of a performance issue.

From your text, it sounds like this performance problem showed up in the last two weeks and prior to that there was no complaints. If this is the case, what happened two weeks ago ? A patching, an increase in the work load, an application upgrade ?

Also, this may not be relevant right now but, keep in mind that, using a workstation class machine like rx2620 as a server will cause you performance problems in the future as the capacity and expandability of this server is very limited.

Hope this helps

[Ganesan R]

Hi,

There are many factors contributing when it comes to performance. And also you should ask yourself many questions. Few questions are,

What is exactly slow? Only a certain application or the whole system?
Can you identify affected processes by names or PID?
Does it affect all users?
About what are the users complaining?

When did it first happen?
What has been changed?
E.g. new/updated software, patches, modified configuration, additional users
How often does it happen?
Does it happen Regularly (daily, weekly) or intermittently?
For how long does it last? seconds, minutes, hours or forever?

If the performance is bad is there anything you can do to alleviate it?
E.g halt Application, reboot system, ...
Is the problem reproducible?
How do you measure it? Which commands or tools do you use?

At a first sight, you can check resource bottlenecks like disk i/o, cpu, memory, network, swap. Great tools are sar -d for disk bottleneck, top for cpu and kmeminfo + vmstat for memory.

Best would be glance if installed. and if the perf problem is only intermittent then OVPA (MeasureWare) is able to show data from the last days/weeks. This is best since it shows everything in relation.