topic Re: sar command doesn't run correctly in Operating System - HP-UX

sar command doesn't run correctly

Marco_67 — Thu, 19 May 2005 06:57:53 GMT

Hello,

I'm getting the following error when running sar command.
sar: Can't open /var/adm/sa/sa19
That sa directory structure is missing on my system (11.11), what's wrong ?
Should I configure sar in advance ?

Re: sar command doesn't run correctly

Robert-Jan Goossens — Thu, 19 May 2005 07:03:11 GMT

Hi Marco,

could you check for the line

/var/spool/cron/crontabs# crontab -l sys
#
# -- SAR informatie
#
0,5,10,15,20,25,30,35,40,45,50,55 * * * 0-6 /usr/lib/sa/sa1

Regards,
Robert-Jan

Re: sar command doesn't run correctly

Marco_67 — Thu, 19 May 2005 07:08:34 GMT

Hi Robert,

that line is missing on my crontab...
Should I add it ?
What does it do ?

Thanks for the moment

Re: sar command doesn't run correctly

Dave Hutton — Thu, 19 May 2005 07:16:36 GMT

Typing "sar" at the command prompt gives you the last 24 hours of history. Like Robert-Jan suggests if you want to type sar without that error to see the last 24 hours. You have to set up that crontab entry so it collects the information.
Otherwise if you are just trying to see current system stats. You need flags on it for example:
# sar -v 5 100

(Theres quite a few so you'll want to check ou the man page.)

Re: sar command doesn't run correctly

Gopi Sekar — Thu, 19 May 2005 07:21:53 GMT

are you trying to run sar manually from command prompt?

you system does not have /var/adm/sa directory, create it and see whether sar runs properly

also, looks like your crontab is not configured with sar to run automatically, you can add the crontab line mentioned so that it can run automatically to collect system statistics periodically

Regards,
Gopi

Re: sar command doesn't run correctly

Devender Khatana — Thu, 19 May 2005 12:16:34 GMT

Hi,

If you have not configured it is crontab and give sar at command prompt and get this error, this is perhaps because you are not providing any arguments to it.

On my system :-
iocbk101:/tmp/som>>sar
sar: Can't open /var/adm/sa/sa19

iocbk101:/tmp/som>>sar 1 11111

HP-UX iocbk101 B.11.11 U 9000/800 05/19/05

22:46:05 %usr %sys %wio %idle
22:46:06 9 56 35 0
22:46:07 8 61 31 0
22:46:08 8 72 20 0
22:46:09 10 65 25 0
22:46:10 10 69 21 0

HTH,
Devender

Re: sar command doesn't run correctly

Rafi Sheikh — Fri, 24 Feb 2006 12:24:29 GMT

It could simply be that you are not placing the t & n with the command (time interval and number of obs)

Re: sar command doesn't run correctly

Geoff Wild — Fri, 24 Feb 2006 12:27:11 GMT

Yes - you need to create the directory structure and then setup sar:

mkdir /var/adm/sa/

The in root's cron, something like:

#
# SAR - for sarcheck
0 * * * * /usr/lib/sa/sa1
10,20,30,40,50 * * * * /usr/lib/sa/sa1
# reduce the sar data
5 19 * * * /usr/lib/sa/sa2 -s 5:00 -e 19:01 -i 600 -A

Rgds...Geoff