topic Re: SAR command bemchmark in Operating System - HP-UX

SAR command bemchmark

Vogra — Tue, 25 Sep 2001 13:02:22 GMT

Hi All!
where can I find "good results" about sar results to compare with my values?
Thanx.

Re: SAR command bemchmark

John Poff — Tue, 25 Sep 2001 13:09:06 GMT

Hello Claudio,

The best "good results" you can find is from your system when it is running normally and you are having good, acceptable response times. Save those numbers and use them to compare against in the future. There are no "correct" numbers to compare against, other than what you have on your system. If you are having some specific problems with a system, you can post the problem and the numbers from 'sar' and some of the local wizards can help you figure out what might be happening.

JP

Re: SAR command bemchmark

Edward Alfert_2 — Tue, 25 Sep 2001 13:18:10 GMT

That depends on what your users find "acceptable" performance.

Take a look at 2 of my servers:

D390 with 56 users on it right now that is used for a database applications:
10:15:33 %usr %sys %wio %idle
10:15:34 7 3 7 83
10:15:35 1 0 2 97
10:15:36 6 1 12 81
10:15:37 3 1 2 94
10:15:38 1 0 9 90

Average 4 1 6 89

E55 webserver with 5 low traffic websites:
10:16:11 %usr %sys %wio %idle
10:16:12 1 0 0 99
10:16:13 0 0 0 100
10:16:14 1 3 0 96
10:16:15 0 0 0 100
10:16:16 0 0 0 100

Average 0 1 0 99

what are your numbers? remember to take them throughout the day. what are they when the activity is low? what is the maximum? do users complain of slow system? is the cpu the bottleneck or the disks?

Re: SAR command bemchmark

Sridhar Bhaskarla — Tue, 25 Sep 2001 13:22:41 GMT

Claudio,

Your question would result a very lengthy answer. There is a white paper published by HP and has been briefed up in this thread.

http://forums.itrc.hp.com/cm/QuestionAnswer/1,1150,0x4284dfe5920fd5118fef0090279cd0f9,00.html

If it's like too much to work on, you can purchase sarcheck, a good tool and it will do the logic for you in performance tuning.

-Sri

Re: SAR command bemchmark

Scott_14 — Tue, 25 Sep 2001 13:51:36 GMT

Hi there:

Check out www.sarcheck.com.

They offer a trial download to help you diag the sar results, then you can purchase it if needed.

I have to admit, from what I read off this site, it sounded good, but I have not tried it.

Re: SAR command bemchmark

alicia briggi — Tue, 25 Sep 2001 17:54:47 GMT

Claudio,
I agree with John. Once you figure out your "normal" system results, you can use them to compare when you are experiencing problems. sar also has many different options to look at different areas of the OS. What sar option specifically were you looking at comparing? It's not good to rely on just one performance tool. I like to use glance and sar and top to compare against each other.

Re: SAR command bemchmark

Sanjay_6 — Tue, 25 Sep 2001 21:12:21 GMT

Hi Claudio,

Have a look at the threads below.

http://us-support.external.hp.com/cki/bin/doc.pl/sid=0a3ab39401f06c6c19/screen=ckiDisplayDocument?docId=200000049436468

http://us-support.external.hp.com/cki/bin/doc.pl/sid=9eb53e1c0aecfe36e3/screen=ckiDisplayDocument?docId=200000050018417

Hope this helps.

thanks

Re: SAR command bemchmark

Sanjay_6 — Tue, 25 Sep 2001 21:19:31 GMT

Hi Claudio,

Here is another thread.

http://us-support2.external.hp.com/cki/bin/doc.pl/sid=26e1f7dc1564e535a8/screen=ckiDisplayDocument?docId=200000056493259

Hope this helps too.

thanks

Re: SAR command bemchmark

Vogra — Wed, 03 Oct 2001 11:31:28 GMT

Hi All!
very interesting the Sarcheck. I'm testing it.
thanx.