On Mon, Feb 24, 2014 at 01:57:02PM +0100, Tazman Deville wrote:
> I have a little server running here in my office,
> and logrotate kept running at c. 7am, and using up 100% CPU.
Logrotate *itself* shouldn't use much CPU. But there are a couple of
things I can think that might make it do so:
* A badly-behaved {pre,post}rotate script. These would, I suspect, show
up as separate processes, though.
* Compression of a large and/or corrupt log file.
In both cases, check through your logrotate config files and try running
logrotate yourself (probably with --debug).
> I changed the line in /etc/crontab to run cron.daily scripts
> at 4:15am, instead of 7:whateveritwas am.
> 15 4 * * *
> Also, in cron.daily/logrotate
> I added
> nice -n 15
> I made these changes two days ago,
> and still, yesterday and today, logrotate is running at 7:30ami-ish,
> and using up almost 100% of CPU cycles.
A couple more points. Is logrotate running at 7:30 simply because it's
STILL running then?
Also note that nicing a process won't, by itself, make the process use
less that 100% CPU. It'll just make other processes more favoured. If
the rest of the system is idle, then a nice process can easily use 100%.
> The "server" is an old refurbed eMachines box,
> 3.2ghz single core celeron with 2gb ram (was my work box from 2007 to
> 2011), and logrotate is beating it up.
>
> How do I get logrotate, first,
> to run at a time when the server is not busy with other stuff
> (I'm actively doing stuff on the server at 7am, but not at 4am, which is
> why I had made that change).
> and/or
> limit its abuse of CPU cycles?
>
> Why is it seemingly not honouring the changes I made to /etc/crontab
> and cron.daily/logrotate?
>
> Taz
> --
> http://tazmandevil.info
> taz hungry
>
>
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