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From: Nikos Vassiliadis <nvass@teledomenet.gr>
To: freebsd-questions@freebsd.org
Date: Thu, 2 Aug 2007 15:17:40 +0300
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Cc: Zbigniew Szalbot <zbigniew@szalbot.homedns.org>
Subject: Re: logging system load
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On Thursday 02 August 2007 13:52, Zbigniew Szalbot wrote:
> Hello,
>
> On Thu, 2 Aug 2007 13:44:33 +0300, Nikos Vassiliadis
> <nvass@teledomenet.gr>
>
> wrote:
> > On Wednesday 25 July 2007 20:50, Momchil Ivanov wrote:
> >> На Wednesday 25 July 2007 19:38:41 Zbigniew Szalbot написа:
> >> > Dear all,
> >> >
> >> > Is there a tool similar to top which would measure system load and
> >> > write it to a file that could later be analyzed? The time when my
> >> > system is most loaded happens between 3 and 5 a.m. so a trace of
> >> > the system load would be a wonderful thing to have. I need it to
> >> > tailor some of the jobs accordingly. Any advice?
> >> >
> >> > Thanks in advance!
> >>
> >> You can make a cronjob doing "uptime >> /path/to/logfile" every
> >> minute
> >
> > Or perhaps "sysctl -n vm.loadavg" instead of uptime,
> > which is the same information, but requires less
> > scrubbing.
>
> Thanks but that wouldn't record the time, would it? With uptime it is
> nice to have the current time also recorded and I can compare logs to
> load by time.

If I had to implement this for me, I would do it this way:
echo `date "+%Y-%m-%d %H:%M"; sysctl -n vm.loadavg`

But I had in mind easy parsing. If you do eye "parsing"
then uptime is fine too:)

Nikos