I have the standard ones and no others.
# run-parts01 * * * * root run-parts /etc/cron.hourly02 4 * * * root run-parts /etc/cron.daily22 4 * * 0 root run-parts /etc/cron.weekly42 4 1 * * root run-parts /etc/cron.monthly
ls -l /etc/cron*-rw-r--r-- 1 root root 0 Apr 6 2009 /etc/cron.deny-rw-r--r-- 1 root root 255 Jan 6 2007 /etc/crontab/etc/cron.d:-rw-r--r-- 1 root root 192 Mar 12 2009 sysstat/etc/cron.daily:-rwxr-xr-x 1 root root 379 Mar 28 2007 0anacronlrwxrwxrwx 1 root root 39 Apr 6 2009 0logwatch -> /usr/share/logwatch/scripts/logwatch.pl-rwxr-xr-x 1 root root 118 Jan 21 2009 cups-rwxr-xr-x 1 root root 180 Mar 12 2009 logrotate-rwxr-xr-x 1 root root 418 Jan 6 2007 makewhatis.cron-rwxr-xr-x 1 root root 137 Mar 12 2009 mlocate.cron-rwxr-xr-x 1 root root 2181 Jun 21 2006 prelink-rwxr-xr-x 1 root root 296 Jan 21 2009 rpm-rwxr-xr-x 1 root root 328 Feb 26 2009 tmpwatch/etc/cron.hourly:-rwxr-xr-x 1 root root 71 Jan 10 2007 mcelog.cron/etc/cron.monthly:-rwxr-xr-x 1 root root 381 Mar 28 2007 0anacron/etc/cron.weekly:-rwxr-xr-x 1 root root 380 Mar 28 2007 0anacron-rwxr-xr-x 1 root root 414 Jan 6 2007 makewhatis.cron
> Date: Fri, 18 Dec 2009 23:45:07 -0700
> Subject: Re: [GENERAL] PL/Perl Performance Problems
> From: scott(dot)marlowe(at)gmail(dot)com
> To: aintokyo(at)hotmail(dot)com
> CC: tgl(at)sss(dot)pgh(dot)pa(dot)us; pgsql-general(at)postgresql(dot)org
>
> On Fri, Dec 18, 2009 at 11:37 PM, Alex - <aintokyo(at)hotmail(dot)com> wrote:
> > Hmm...
> > how can that be. This is happening every day, so its not a one off or
> > happens once in the morning then in the afternoon. There is also no other
> > task running on the system, its dedicated to postgres.
> > Could the Autovacuum cause problems? Starting to invoke Analyze at the
> > beginning of the day but the keep silent till the day timestamp breaks ?
> > The think is that I have 4 servers setup in a similar way and all have
> > exactly the same problem.
>
> What cron jobs are on that machine that run at night? Note that on
> many OSes, maintenance crons are scheduled in a dir something like
> /etc/cron.daily etc... On my laptop they all run at midnight. I'm
> wondering if they're blowing out your cache so that you just don't
> have the same performance the first time you hit a particular dataset
> after they've run. Just a guess. You could try disabling them for a
> day and see what happens.
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