Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 2736 invoked from network); 22 Nov 2010 18:45:25 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 22 Nov 2010 18:45:25 -0000 Received: (qmail 36415 invoked by uid 500); 22 Nov 2010 18:45:55 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 36384 invoked by uid 500); 22 Nov 2010 18:45:55 -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 36376 invoked by uid 99); 22 Nov 2010 18:45:55 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 22 Nov 2010 18:45:55 +0000 X-ASF-Spam-Status: No, hits=0.0 required=10.0 tests=FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of tran.hieutrung@gmail.com designates 209.85.210.44 as permitted sender) Received: from [209.85.210.44] (HELO mail-pz0-f44.google.com) (209.85.210.44) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 22 Nov 2010 18:45:49 +0000 Received: by pzk33 with SMTP id 33so10230pzk.31 for ; Mon, 22 Nov 2010 10:45:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=0ZxSOMmf/9tFD9/uyb00ePxc7ip7Kb5r/d+B2BGEF1U=; b=x+RQsqCvS3GSvYjODmE+Rq4mpRYLG+FembtFaq8trsJFtNgsBtq5OJKe/1kkuh528K hXwwNx0yfWz2MNb2X5dWOf99Qq8QWM2d106tLIfgJWrJzAr4ZHa74mrF2koJB2gXZdFw iN1Op4esCtMC8yxo7/AlRX6kPJCAUqskO/ZtA= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=lGa7amMdGHycYJFskDPogdniivegr6KfugJCJ1UHAug7KklHZYRcPU/s5p08t3gXrM OKIJwOHvCt4RvoV/KQpAsidzjuOuKo2ROu1ph2W0CznoprD5Ox8o8aLCzB9SDwp5cBN5 xlRZO/pKXKXWiQhbv1kLiIAlXhKuLLc9kTygg= MIME-Version: 1.0 Received: by 10.229.189.20 with SMTP id dc20mr5504748qcb.125.1290451528379; Mon, 22 Nov 2010 10:45:28 -0800 (PST) Received: by 10.229.237.195 with HTTP; Mon, 22 Nov 2010 10:45:28 -0800 (PST) Date: Mon, 22 Nov 2010 10:45:28 -0800 Message-ID: Subject: Newbie question on Cassandra mem usage From: Trung Tran To: user@cassandra.apache.org Content-Type: text/plain; charset=ISO-8859-1 Hi, I have a test cluster of 3 nodes, 14Gb of mem in each node, replication factor = 3. With default -Xms and Xmx, my nodes are set to have max-heap-size = 7Gb. After initial load with about 200M rows (write with hector default consistencylevel = quorum,) my nodes memory usage are up to 13.5Gb, show a bunches of GC notifications and eventually crashes with java.lang.OutOfMemoryError: Java heap space. Is there any setting that can help with this scenario? Thanks, Trung.