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CPU 0% idle - how do I find what was running?

 
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# 1  
Old 04-27-2009
CPU 0% idle - how do I find what was running?
Hi, I checking yesterday's SAR logs for one of our servers and it was showing that utilisation was down to 0% for 10 minutes at 2am. We're unaware of any jobs running at this time so need to find out which process caused this spike.

Is there anything built into SAR (or does anything else exist) that allows you to see what processes where historically running at certain times of the day?

This is on a Solaris 10 box by the way.

Thanks in advance. Smilie
# 2  
Old 04-27-2009
you may have top installed.

top will show what's using CPU.

often found in /usr/local/bin/top
# 3  
Old 04-27-2009
Quote:
Originally Posted by robsonde
you may have top installed.

top will show what's using CPU.

often found in /usr/local/bin/top
The original poster was specifically looking for historical data. top() does not provide historical data.

More later..... From my mobile
# 4  
Old 04-27-2009
Thanks. Yeah, it's a historical process that I was after. I shall wait patiently for your non-mobile based response... Smilie
# 5  
Old 04-27-2009
Quote:
Originally Posted by dlam
Thanks. Yeah, it's a historical process that I was after. I shall wait patiently for your non-mobile based response... Smilie
I recommend that you install a free monitoring package that (1) stores performance data in an open source database, (2) has excellent charting / visualization capabilities, (3) works well out-of-the-box and (4) is easily extended.

For this site, we use Zabbix to monitor and troubleshoot performance issues.
# 6  
Old 04-27-2009
Were you running a backup?

Anything in cron around that time?
# 7  
Old 04-27-2009
Quote:
Originally Posted by methyl
Were you running a backup?

Anything in cron around that time?
Those are good basic questions.

Realisticly, before making inquiries is would be best to know the applications running on the server.

The poster was asked about monitoring tools, which is a different line of questioning than helping him uncover a problem.

Visualization / monitoring tools are free and work great. Installing one will reap many benefits.
 
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