# run-parts
01 * * * * root run-parts /etc/cron.hourly
02 4 * * * root run-parts /etc/cron.daily
22 4 * * 0 root run-parts /etc/cron.weekly
42 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 0anacron
lrwxrwxrwx 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.marlowe@gmail.com
> To: aintokyo@hotmail.com
> CC: tgl@sss.pgh.pa.us; pgsql-general@postgresql.org
>
> On Fri, Dec 18, 2009 at 11:37 PM, Alex - <aintokyo@hotmail.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.
