Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 97933 invoked from network); 17 Sep 2010 16:05:00 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 17 Sep 2010 16:05:00 -0000 Received: (qmail 73076 invoked by uid 500); 17 Sep 2010 16:04:58 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 72759 invoked by uid 500); 17 Sep 2010 16:04:55 -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 72747 invoked by uid 99); 17 Sep 2010 16:04:54 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 17 Sep 2010 16:04:54 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=10.0 tests=RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of jedd.rashbrooke@imagini.net designates 209.85.214.44 as permitted sender) Received: from [209.85.214.44] (HELO mail-bw0-f44.google.com) (209.85.214.44) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 17 Sep 2010 16:04:47 +0000 Received: by bwz9 with SMTP id 9so3743868bwz.31 for ; Fri, 17 Sep 2010 09:04:27 -0700 (PDT) MIME-Version: 1.0 Received: by 10.204.82.136 with SMTP id b8mr4106389bkl.38.1284739466781; Fri, 17 Sep 2010 09:04:26 -0700 (PDT) Received: by 10.204.63.65 with HTTP; Fri, 17 Sep 2010 09:04:26 -0700 (PDT) In-Reply-To: <4C938CF3.2060907@digg.com> References: <4C938CF3.2060907@digg.com> Date: Fri, 17 Sep 2010 17:04:26 +0100 Message-ID: Subject: Re: Dazed and confused with Cassandra on EC2 ... From: Jedd Rashbrooke To: user@cassandra.apache.org Content-Type: text/plain; charset=ISO-8859-1 X-Virus-Checked: Checked by ClamAV on apache.org Hi Rob, Thanks for your suggestions. I should have been a bit more verbose in my platform description -- I'm using 64-bit instances, which I think in a Ben Black video I saw led to a sensible default usage of mmap when left at auto. Should I look at forcing this setting? > You don't mention which version of the deb package you're using, but : I'm using 0.6.5 - the ones bundled by Eric Evans Because these are 32GB machines, I've not configured them with any swap at all. I've rarely done this in the past - but was aware there was this swap-hell scenario with JVM's, and the rationale makes sense -- it's better to have the JVM crash ''cleanly" than to have it grind the machine to a halt and make it impossible to get onto the machine to kill the process. cheers, Jedd.