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On a 2nd thought... where does the cach come into play when i only do inserts and no selects. Alex > Date: Fri, 18 Dec 2009 23:45:07 -0700 > Subject: Re: PL/Perl Performance Problems > From: scott.marlowe@xxxxxxxxx > To: aintokyo@xxxxxxxxxxx > CC: tgl@xxxxxxxxxxxxx; pgsql-general@xxxxxxxxxxxxxx > > On Fri, Dec 18, 2009 at 11:37 PM, Alex - <aintokyo@xxxxxxxxxxx> 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. > > -- > Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general Meet singles at ninemsn dating Looking for a great date? |
