Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1ZjhNh-0002jS-Im for pgsql-performance@arkaria.postgresql.org; Wed, 07 Oct 2015 05:35:13 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.84) (envelope-from ) id 1ZjhNh-0001il-4e for pgsql-performance@arkaria.postgresql.org; Wed, 07 Oct 2015 05:35:13 +0000 Received: from makus.postgresql.org ([2001:4800:1501:1::229]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.84) (envelope-from ) id 1ZjhNg-0001iW-HP for pgsql-performance@postgresql.org; Wed, 07 Oct 2015 05:35:12 +0000 Received: from mx-out.zmailcloud.com ([192.198.85.98] helo=mx-out-1.zmailcloud.com) by makus.postgresql.org with esmtp (Exim 4.84) (envelope-from ) id 1ZjhNZ-00082m-Ah for pgsql-performance@postgresql.org; Wed, 07 Oct 2015 05:35:11 +0000 Received: from smtp.01.com (smtp.01.com [10.10.0.43]) by mx-out-1.zmailcloud.com (Postfix) with ESMTP id 7D2C2563F63; Wed, 7 Oct 2015 00:35:04 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by smtp-out-1.01.com (Postfix) with ESMTP id 61DB8A038E; Wed, 7 Oct 2015 00:35:04 -0500 (CDT) X-Virus-Scanned: amavisd-new at smtp-out-1.01.com Received: from smtp.01.com ([127.0.0.1]) by localhost (smtp-out-1.01.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TxLy_EWTK-nZ; Wed, 7 Oct 2015 00:35:04 -0500 (CDT) Received: from smtp.01.com (localhost [127.0.0.1]) by smtp-out-1.01.com (Postfix) with ESMTP id 2941CA0392; Wed, 7 Oct 2015 00:35:04 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by smtp-out-1.01.com (Postfix) with ESMTP id 08B34A0390; Wed, 7 Oct 2015 00:35:04 -0500 (CDT) X-Virus-Scanned: amavisd-new at smtp-out-1.01.com Received: from smtp.01.com ([127.0.0.1]) by localhost (smtp-out-1.01.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id PNrZksD_El5h; Wed, 7 Oct 2015 00:35:03 -0500 (CDT) Received: from [10.0.30.72] (unknown [216.38.136.194]) by smtp-out-1.01.com (Postfix) with ESMTPSA id 81409A038E; Wed, 7 Oct 2015 00:35:03 -0500 (CDT) Subject: Re: shared-buffers set to 24GB but the RAM only use 4-5 GB average To: FattahRozzaq , Igor Neyman References: Cc: "pgsql-performance@postgresql.org" From: Josh Berkus Organization: PostgreSQL Experts Inc. Message-ID: <5614AF06.1050502@agliodbs.com> Date: Tue, 6 Oct 2015 22:35:02 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Pg-Spam-Score: -2.6 (--) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-performance Precedence: bulk Sender: pgsql-performance-owner@postgresql.org On 10/06/2015 02:33 AM, FattahRozzaq wrote: > @Merlin Moncure, I got the calculation using pg_tune. And I modified > the shared_buffers=24GB and the effective_cache_size=64GB I really need to get Greg to take down pg_tune. It's way out of date. Probably, I should replace it. -- Josh Berkus PostgreSQL Experts Inc. http://pgexperts.com -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance