sar

[Rafi Sheikh]

Is it possible to have sar capture stats for a specific PID? I read information for UNIX95, however, I need to get some sar specific information but I do not want the stats skewed by the activity in the whole server?

[Bharat Katkar · Accepted solution]

Hi Rafi,
You can have process table status using "sar -v" but doubt if sar can monitor a particular PID.
Regards,

[RAC_1]

sar is not designed for that. To monitor particular pid, you will have to use glance/custom scripts.

What exactly you want to monitor? Give details.

[Rafi Sheikh]

Well we have two servers RX8420 and RS8620 (RISC & Itanium). On a repeatable code which is CPU bound one takes 10 min (RISC) while ITA takes 25 minutes. We ran some sar related reports (d, q, u, etc.) and looks that there is not much an I/O contention. I knwo we can use iostat and or vmstat but when we ran the analysis we limited the server access, which is not possible today :) (multiple users are on now).

I am open to any suggestions. I am not sure the measureware circular logs are kept for too long or may well be inaccessible and I would like to capture stats.

Any other idea? As I mentioned I am open to tap into your collective expertise.

Much obliged.

Rafi

[Arunvijai_4]

Hello Rafi,

To measure performance, you can use UNIX's built-in tools like, vmstat, top, ps with UNIX95 and iostat.

-Arun

[Arunvijai_4]

Hi Rafi,

Some more links,

http://www.redhat.com/magazine/011sep05/features/tools/
http://www.hpux.ws/buildmail.hpux.text
(SEP's system performance script)

-Arun

[Geoff Wild]

What kind of code?

If it is compiled - did you re-compile on Itanium?

Rgds...Geoff

[Rafi Sheikh]

Hi, no actually just a SAS based code run by a user.

[AshishJain_USA]

Rafi

Since you mentioned that its a code run by the user, you may actuall write a script which should capture

1. grep the process initiated by the user code
2. grep the process id from this

then you may use "top" and find out the stats related to this pid.

rgds..Ashish

[RAC_1]

Did the program take different (quite differnt) when you isolated the system and ran it?? Was it still the same? 10 min on PA and more time on IA? When running on IA, run it with tusc and try to compare it with PA. Does it make any unnecessary sys calls?? Any contention on cpu??