OS7800 High CPU

dcwilliams · Post by **dcwilliams** » 04 May 2010 21:14

I have a OS7800 running at 100% CPU Utilization when you do the show health command. The switch is running and no users are complaining. I have done some debugs, looked at spanning tree, and looked at each module but I have not been able to find out what is causing the high CPU. does anyone have any advise on this?

cedric1 · Post by **cedric1** » 01 Jun 2010 16:01

hello

try this

Commands to run in dshell via console access
->kTraceFlags=1 [start]
->kTraceEnable [Enable]
->kTraceTSSnum=200 [increase the default sample interval from 40 to 200]
->kTraceTaskSwitchShow [dump the buffer to show the task taking up the resource]

Cedric

benny · Post by **benny** » 02 Jun 2010 11:47

Cedric,

I find it very risky to give "Enable" commands without any "Disable" commands. Using the dshell can cause a lot of trouble in the network, unless you know exactly what you are doing.

A simple "spy" would have done it as well.

-benny

cedric1 · Post by **cedric1** » 02 Jun 2010 16:40

hello

You are right.

How do you disable spy command as i try to us it but every 5s I get task output

exit of dshell is enough ?

Cedric

benny · Post by **benny** » 03 Jun 2010 03:08

So now you know what I mean ...

The command to stop the output of "spy" is:
Working: [Kernel]->spyStop

-benny

cedric1 · Post by **cedric1** » 03 Jun 2010 04:49

ok hope it will help dcwilliams

It is a good reminder to take all precaution before troubleshooting

Regards

Cedric