Received: from localhost (wm.hub.org [200.46.204.128]) by postgresql.org (Postfix) with ESMTP id 598739FB22F for ; Mon, 2 Oct 2006 13:26:07 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.128]) (amavisd-new, port 10024) with ESMTP id 16660-06-3 for ; Mon, 2 Oct 2006 16:26:03 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey- Received: from lists.commandprompt.com (host-130.commandprompt.net [207.173.203.130]) by postgresql.org (Postfix) with ESMTP id CB7C29FB1DA for ; Mon, 2 Oct 2006 13:26:02 -0300 (ADT) Received: from [192.168.1.95] (or-67-76-146-141.sta.embarqhsd.net [67.76.146.141]) (authenticated bits=0) by lists.commandprompt.com (8.13.7/8.13.6) with ESMTP id k92GQ01E012079 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 2 Oct 2006 09:26:01 -0700 Message-ID: <45213D9F.1020109@commandprompt.com> Date: Mon, 02 Oct 2006 09:26:07 -0700 From: "Joshua D. Drake" Organization: Command Prompt, Inc. User-Agent: Thunderbird 1.5.0.7 (X11/20060918) MIME-Version: 1.0 To: Marcelo Costa CC: pgsql-performance@postgresql.org Subject: Re: How much memory in 32 bits Architecture to Shared Buffers References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV version 0.88.4, clamav-milter version 0.88.4 on projects.commandprompt.com X-Virus-Status: Clean X-Greylist: Sender succeded SMTP AUTH authentication, not delayed by milter-greylist-1.6 (lists.commandprompt.com [192.168.2.159]); Mon, 02 Oct 2006 09:26:01 -0700 (PDT) X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0.135 tagged_above=0 required=5 tests=FORGED_RCVD_HELO X-Spam-Level: X-Archive-Number: 200610/8 X-Sequence-Number: 21137 Marcelo Costa wrote: > Hi, to all! > > Recently i try increasing the memory values of shared buffers on one > IBM xseries 255 (Quad XEON 2.8, 8 GB RAM, 2 disk SCSI 36 GB(Raid 1), 1 > Storage. You haven't specified your OS so I am going to assume Linux. > Where I start up the cluster very messages of configurations errors on > shared_memmory and SHMMAX look up. I try change the values of > shared_memory, max_connections and effective_cache_size and large the > size of SHMALL and SHMMAX to use 4294967296 (4096 MB) but the cluster > don't start. You have to edit your sysctl.conf see: http://www.postgresql.org/docs/8.1/static/runtime.html I *think* (I would have to double check) the limit for shared memory on linux 32bit is 2 gig. Possibly 2 gig per CPU I don't recall. I run all 64bit now. Sincerely, Joshua D. Drake -- === The PostgreSQL Company: Command Prompt, Inc. === Sales/Support: +1.503.667.4564 || 24x7/Emergency: +1.800.492.2240 Providing the most comprehensive PostgreSQL solutions since 1997 http://www.commandprompt.com/