topic Slow system... in Operating System - HP-UX

Slow system...

Jonathan Caplette — Fri, 28 Jun 2002 12:11:00 GMT

Hi guys!!

I got a Vizualise B-1000 with HP-UX 10.20 loaded on it... The person who was working on it called me and told me that the station was going slow... So I log on the station, I checked with "top" and all the processe are in sleep mode, all the time... I run "vmstat" and my memorie is ok on that system... I tried to reboot the system and nothing changed, all the process are in sleep mode.

Any ideas of what can cause that???

Regards
Jonathan

Re: Slow system...

Peter Kloetgen — Fri, 28 Jun 2002 12:23:10 GMT

Hi Jonathan,

this is normal behaviour. Most processes are started and then they wait for something to do, a call for them by system or a user. During this period they are shown as "sleeping". Bad news would be if top would show zombies for example.

How about system configuration? Perhaps to less RAM or something like that? Or some kernel parameters with wrong settings? Perhaps to less swap space?

Please give us more information.

Allways stay on the bright side of life!

Peter

Re: Slow system...

Robert Gamble — Fri, 28 Jun 2002 12:26:49 GMT

Seeing the 'sleep' mode is perfectly normal.

The top command shows exaclty what each process' state is when top is ran. If top is running, then the other processes are sleeping. Occasionally you might see other states in other processes, but they were actually sleeping.

As for why the system is slow, try using Glance+. It is a great performance troubleshooting tool. A free 60-day trial version should either be already loaded, or on your application CD set.

Good Luck!

Re: Slow system...

rainer doelker — Fri, 28 Jun 2002 12:35:29 GMT

Jonathan

what exactely is the thing your user claims about. Is he turning a 3D object in a CAD application? Or just awaiting the response from an ls command? Is is related to any network-access, e.g. name-resolution or NFS-files?

What else happens in the background - some numbercrunshing? Since when does it happen and what changed?

Lots of questions for you :-)
rainer

Re: Slow system...

Tom Maloy — Fri, 28 Jun 2002 12:39:31 GMT

Sleep is not a bad thing. Unless all of the programs are waiting for a single resource, such as a tape, which is locked by another program. And the reboot should have cleared up things like stale NFS handles.

So we need more details from the user. What specific things are running slow? That should narrow the search.

Tom

Re: Slow system...

Martin Johnson — Fri, 28 Jun 2002 12:54:01 GMT

Check network activity, especially DNS resolution.

The last time I experienced slow response time I had a bad disk in my vg00 volume group. Part of the swapfile was on the disk. The slow response time was caused by repeated attempts to write to the swapfile on the bad disk.

HTH
Marty

Re: Slow system...

John Bolene — Fri, 28 Jun 2002 13:13:07 GMT

Please help us out and tell us what going slow actually means.

Are the processes slow?
Is telnetting slow?

What actually is slow?

It may just be a DNS issue in not resolving the host name and DNS times out after about 40 seconds.

Re: Slow system...

MANOJ SRIVASTAVA — Fri, 28 Jun 2002 13:21:36 GMT

Hi

What is o/p of sar 2 10 , like where is the system spending time , in case you can post the o/p of sar 2 10 , and also sar -d 2 10 then may be you can get more cluses. I understand that you are looging remtoe so the name etc are fine.

Manoj Srivastava

Re: Slow system...

Jonathan Caplette — Tue, 02 Jul 2002 12:38:02 GMT

Hi guys...

Thank you for your replies,

The problem that I was refering to is, after that I've spoke to the user, he is using GIMP, and it's only with that application, that the machine it's slow...

His file was to big, that was the problem...

Thanks for the help!!!
Ciao!