topic Re: Interesting High CPU% in Java process in Operating System - HP-UX

Interesting High CPU% in Java process

Watcher_1 — Tue, 29 Jan 2002 08:43:42 GMT

I use top command.
I found that a PA process (Java program) of %CPU is quite high (40% to 50%), but IDLE is about 90-99%.

It is not reasonable for me since idle + PA process > 100 %.

But i use sar command, it is normal.

I have many many confusions!!!!
I don't understand there is a great different between sar and top.
Is top command making confusion to me?
I can't explain this happening!
Please help!!

Re: Interesting High CPU% in Java process

Deepak Extross — Tue, 29 Jan 2002 12:16:10 GMT

Chan,
Is this a single-CPU machine?

Re: Interesting High CPU% in Java process

Watcher_1 — Wed, 30 Jan 2002 02:36:52 GMT

No, it is dual CPU machine

9000/800/L1000-5X
HP9000L1000
2x550Mhz CPU
2GB RAM

Chan

Re: Interesting High CPU% in Java process

Michael Tully — Wed, 30 Jan 2002 02:47:35 GMT

Hi,

The use of top can be confusing. There has been
threads posted about this very issue, and from
the results it was solved by the installation
of patches. Suggest you have a look at the latest patches for your system.

-Michael

Re: Interesting High CPU% in Java process

Michael Tully — Wed, 30 Jan 2002 02:59:28 GMT

Hi,

I found what I've been looking for. As I mentioned in my previous reply the problem was fixed with patches. In the following thread which has the same problem described, there are a number of patch suggestions. I've linked it here so you can read it.

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x5e28cbaac6dcd5118ff40090279cd0f9,00.html

HTH
-Michael

Re: Interesting High CPU% in Java process

Watcher_1 — Thu, 31 Jan 2002 09:45:15 GMT

I have checked the patches of the unix box.
it has patched those metioned patches.

# PHCO_17439 1.0 top(1) cumulative patch
# PHCO_21892 1.0 top(1) cumulative patch
# PHKL_20170 1.0 Dino (GSCtoPCI) spinlock