Return-Path: Delivered-To: apmail-hadoop-core-commits-archive@www.apache.org Received: (qmail 9122 invoked from network); 26 Mar 2009 07:46:15 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 26 Mar 2009 07:46:15 -0000 Received: (qmail 20424 invoked by uid 500); 26 Mar 2009 07:46:15 -0000 Delivered-To: apmail-hadoop-core-commits-archive@hadoop.apache.org Received: (qmail 20357 invoked by uid 500); 26 Mar 2009 07:46:14 -0000 Mailing-List: contact core-commits-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: core-dev@hadoop.apache.org Delivered-To: mailing list core-commits@hadoop.apache.org Received: (qmail 20228 invoked by uid 99); 26 Mar 2009 07:46:14 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 26 Mar 2009 07:46:14 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [192.87.106.226] (HELO aurora.apache.org) (192.87.106.226) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 26 Mar 2009 07:46:07 +0000 Received: from aurora.apache.org (localhost [127.0.0.1]) by aurora.apache.org (8.13.8+Sun/8.13.8) with ESMTP id n2Q7ji04008735 for ; Thu, 26 Mar 2009 07:45:46 GMT Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Apache Wiki To: core-commits@hadoop.apache.org Date: Thu, 26 Mar 2009 07:45:44 -0000 Message-ID: <20090326074544.8520.15335@aurora.apache.org> Subject: [Hadoop Wiki] Update of "Hbase/Troubleshooting" by AndrewPurtell X-Virus-Checked: Checked by ClamAV on apache.org Dear Wiki user, You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification. The following page has been changed by AndrewPurtell: http://wiki.apache.org/hadoop/Hbase/Troubleshooting The comment on the change is: Add note about "-XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode" ------------------------------------------------------------------------------ * In accordance with your hardware, tune your heap space / garbage collector settings in the HBASE_OPTS variable of {{{$HBASE_CONF/hbase-env.sh}}}. Try the ''concurrent garbage collector'' {{{(-XX:+UseConcMarkSweepGC)}}} to avoid to stop the threads during GC. Read these articles for more info about Hotspot GC settings * [http://java.sun.com/docs/hotspot/gc1.4.2/faq.html Garbage collector FAQ] Quick overview * [http://java.sun.com/javase/technologies/hotspot/gc/gc_tuning_6.html Tuning garbage collector in Java SE 6] + * For Java SE 6, some users have had success with {{{ -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode }}}