topic Re: cpu utilization in Operating System - HP-UX

cpu utilization

student_of_unix — Fri, 01 Jun 2007 08:43:24 GMT

hi All

Customer has raised a case(ticket) saying that the server(hp-ux) is responding very slow .

pls let me know the stepwise troubleshooting for performance related issues.

Regards
Ak

Re: cpu utilization

Doug O'Leary — Fri, 01 Jun 2007 08:55:20 GMT

Hey;

That's only a little less complex than saying "please give me a procedure for doing brain surgery".

Performance monitoring and tuning is an art; one that can be learned, but still an art. There are any number of books and classes on it. It's not something that can be easily put into procedures becuase it's more of a deductive exercise. You go where the data points you.

Commands that you'll find useful:

sar
vmstat
iostat
glance # if purchased
perfview # if purchased

I'll leave you to your man page reading :)

Doug

Re: cpu utilization

Doug O'Leary — Fri, 01 Jun 2007 08:56:05 GMT

Oh yea;

forgot:

netstat
lanscan
lanadmin

Doug

Re: cpu utilization

spex — Fri, 01 Jun 2007 09:00:40 GMT

HP-UX Performance Cookbook:
http://h21007.www2.hp.com/dspp/files/unprotected/devresource/Docs/TechPapers/UXPerfCookBook.pdf

HP-UX Kernel Tuning and Performance Guide:
http://docs.hp.com/en/1219/tuningwp.html

Re: cpu utilization

Paul Senior_1 — Fri, 01 Jun 2007 09:33:37 GMT

tell us what version hpux you are running, what db is running, what application is running, i.e. how is the server setup.
Does the server run in isolation or linked to other servers at the o/s, db or application level?
interrogate the user - just 1 user or everybody affected?
some of the time or only at peak times?
what proccesses are running slowly - backups? ftp transfers? logins?

Re: cpu utilization

Patrick Wallek — Fri, 01 Jun 2007 09:52:16 GMT

Other things to check:

If you don't have glance installed, you can use 'top' to see the top processes using CPU.

Check the output of 'swapinfo -tam' to see if you have paged anything at to your device swap.

Determine what EXACTLY the customer means when they say "...the server(hp-ux) is responding very slow ." Do they mean it is slow to log in? Do they mean it is slow doing normal daily tasks?

Re: cpu utilization

student_of_unix — Fri, 08 Jun 2007 06:36:36 GMT

:) thanks