X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id AB82552992 for ; Tue, 19 Jul 2005 13:55:46 -0300 (ADT) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 74392-06 for ; Tue, 19 Jul 2005 16:55:37 +0000 (GMT) Received: from wproxy.gmail.com (wproxy.gmail.com [64.233.184.203]) by svr1.postgresql.org (Postfix) with ESMTP id BD17652988 for ; Tue, 19 Jul 2005 13:55:36 -0300 (ADT) Received: by wproxy.gmail.com with SMTP id 50so385440wri for ; Tue, 19 Jul 2005 09:55:36 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=KWFv+gVJIe573uxo5XQb/weA2zAVI7YRaQ1bXSx6rD4E0OSMBAMRfZ1pkhJadaLIpJiPy7T0FsGVLx4l1dbC9YgkeZCFc6e5S/rBBKzQu+R/WucZu4bkIxaWBu1S+OzKFA070PwF5R9o4fNu85Dvqqooyhf/aqTJiCaI9yJo86Q= Received: by 10.54.36.59 with SMTP id j59mr799612wrj; Tue, 19 Jul 2005 09:54:35 -0700 (PDT) Received: by 10.54.120.11 with HTTP; Tue, 19 Jul 2005 09:54:35 -0700 (PDT) Message-ID: <59d991c4050719095440cd3de5@mail.gmail.com> Date: Tue, 19 Jul 2005 12:54:35 -0400 From: Christopher Petrilli Reply-To: Christopher Petrilli To: Tom Lane Subject: Re: Impact of checkpoint_segments under continual load conditions Cc: PFC , Vivek Khera , pgsql-performance@postgresql.org In-Reply-To: <7224.1121791328@sss.pgh.pa.us> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline References: <59d991c4050717100874c08a86@mail.gmail.com> <16394.1121715156@sss.pgh.pa.us> <59d991c405071812342e290f57@mail.gmail.com> <16794.1121718743@sss.pgh.pa.us> <59d991c405071907482bb0689b@mail.gmail.com> <59d991c4050719084460b376f1@mail.gmail.com> <4541.1121788647@sss.pgh.pa.us> <59d991c40507190930244ba9bb@mail.gmail.com> <7224.1121791328@sss.pgh.pa.us> X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.153 tagged_above=0 required=5 tests=AWL, RCVD_BY_IP X-Spam-Level: X-Archive-Number: 200507/292 X-Sequence-Number: 13533 As I'm doing this, I'm noticing something *VERY* disturbing to me: postmaster backend: 20.3% CPU psql frontend: 61.2% CPU WTF? The only thing going through the front end is the COPY command, and it's sent to the backend to read from a file? Chris --=20 | Christopher Petrilli | petrilli@gmail.com