Received: from makus.postgresql.org ([98.129.198.125]) by malur.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TG7sK-00057C-6R for pgsql-performance@postgresql.org; Mon, 24 Sep 2012 12:35:00 +0000 Received: from moutng.kundenserver.de ([212.227.17.9]) by makus.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TG7sI-0002HS-RR for pgsql-performance@postgresql.org; Mon, 24 Sep 2012 12:34:59 +0000 Received: from awork2.localnet (p5DDC5657.dip.t-dialin.net [93.220.86.87]) by mrelayeu.kundenserver.de (node=mrbap0) with ESMTP (Nemesis) id 0Lf0SV-1TpDIc3I2J-00qJEv; Mon, 24 Sep 2012 14:34:57 +0200 From: Andres Freund Organization: 2ndquadrant.com To: pgsql-performance@postgresql.org Subject: Re: Postgres becoming slow, only full vacuum fixes it Date: Mon, 24 Sep 2012 14:34:56 +0200 User-Agent: KMail/1.13.7 (Linux/3.6.0-rc6-andres-00066-g2682cc4-dirty; KDE/4.8.4; x86_64; ; ) Cc: Julien Cigar References: <71DC95CE-16EF-4D53-9971-C573DCD30622@gmail.com> <50605035.8020107@ulb.ac.be> In-Reply-To: <50605035.8020107@ulb.ac.be> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Message-Id: <201209241434.56760.andres@2ndquadrant.com> X-Provags-ID: V02:K0:1mhqz/2lpjyI6V/dWMM9MnVme/h0PdTNOKJE7O78DLo ts8kgvFWdlWAXtn79a1k5MHvF9nnr4uZncjcP1Ycg7CzFBW140 bp4sWNqBXRWPlfTjzwNU0Xx5RIo1F+ysoQ0efvrBu/mKf+50j2 nzbAOuFTN+j73sNiBJQs4U3gSpOBOh2e4JdqPPs5hUGLu4Oo7V ZEwpuEDuNRZUQCp/uRht8wfenPHxtz1Dkhknn4ijzeN8nkQdtc 01ShfbOLG0s1uNSp0kmT83izhw319eY0X8qJKUObQXU+9D0oGW j4Kez5nD1rpm64wa3BuUnSpneZ3RDGF/BwLl9Dt907xKQEv5jD sJjOKqEoCqXDLQA30BpJMzE06iTc2foeMmRas2cqw X-Pg-Spam-Score: -1.9 (-) X-Archive-Number: 201209/107 X-Sequence-Number: 47853 On Monday, September 24, 2012 02:21:09 PM Julien Cigar wrote: > 5) synchronous_commit = off should only be used if you have a > battery-backed write cache. Huh? Are you possibly confusing this with full_page_writes? Greetings, Andres -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services