Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 8129 invoked from network); 7 Oct 2010 19:27:28 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 7 Oct 2010 19:27:28 -0000 Received: (qmail 12213 invoked by uid 500); 7 Oct 2010 19:27:24 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 12179 invoked by uid 500); 7 Oct 2010 19:27:24 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 12139 invoked by uid 99); 7 Oct 2010 19:27:23 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 07 Oct 2010 19:27:23 +0000 X-ASF-Spam-Status: No, hits=0.7 required=10.0 tests=RCVD_IN_DNSWL_NONE,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (nike.apache.org: local policy) Received: from [209.85.160.172] (HELO mail-gy0-f172.google.com) (209.85.160.172) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 07 Oct 2010 19:27:15 +0000 Received: by gyh20 with SMTP id 20so93609gyh.31 for ; Thu, 07 Oct 2010 12:26:49 -0700 (PDT) MIME-Version: 1.0 Received: by 10.150.69.26 with SMTP id r26mr1625320yba.169.1286479528907; Thu, 07 Oct 2010 12:25:28 -0700 (PDT) Sender: scode@scode.org Received: by 10.150.60.11 with HTTP; Thu, 7 Oct 2010 12:25:28 -0700 (PDT) X-Originating-IP: [213.114.156.79] In-Reply-To: References: Date: Thu, 7 Oct 2010 21:25:28 +0200 X-Google-Sender-Auth: fCDWUqOg5sZw62aZ9HjeaA31SWs Message-ID: Subject: Re: Tuning cassandra to use less memory From: Peter Schuller To: user@cassandra.apache.org Content-Type: text/plain; charset=UTF-8 X-Virus-Checked: Checked by ClamAV on apache.org > The nodes are still swapping, even though the swappiness is set to zero > right now. After swapping comes the OOM. In addition to what's already been said, consider just flat out disabling swap completely, unless you have other things on the machine that cause swap to be significantly useful (i.e., lots of truly unused stuff that is good to keep swapped out). -- / Peter Schuller