Return-Path: Delivered-To: apmail-hadoop-mapreduce-issues-archive@minotaur.apache.org Received: (qmail 89182 invoked from network); 8 Apr 2010 09:48:59 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 8 Apr 2010 09:48:59 -0000 Received: (qmail 28178 invoked by uid 500); 8 Apr 2010 09:48:59 -0000 Delivered-To: apmail-hadoop-mapreduce-issues-archive@hadoop.apache.org Received: (qmail 28091 invoked by uid 500); 8 Apr 2010 09:48:58 -0000 Mailing-List: contact mapreduce-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: mapreduce-issues@hadoop.apache.org Delivered-To: mailing list mapreduce-issues@hadoop.apache.org Received: (qmail 28079 invoked by uid 99); 8 Apr 2010 09:48:58 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 08 Apr 2010 09:48:58 +0000 X-ASF-Spam-Status: No, hits=-1247.1 required=10.0 tests=ALL_TRUSTED,AWL X-Spam-Check-By: apache.org Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 08 Apr 2010 09:48:57 +0000 Received: from brutus.apache.org (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id A7792234C4A9 for ; Thu, 8 Apr 2010 09:48:36 +0000 (UTC) Message-ID: <1938023120.9041270720116684.JavaMail.jira@brutus.apache.org> Date: Thu, 8 Apr 2010 09:48:36 +0000 (UTC) From: "Xiao Kang (JIRA)" To: mapreduce-issues@hadoop.apache.org Subject: [jira] Commented: (MAPREDUCE-1685) Debug statements affecting performance of JobTracker.heartbeat In-Reply-To: <520545063.8591270716216902.JavaMail.jira@brutus.apache.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/MAPREDUCE-1685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12854879#action_12854879 ] Xiao Kang commented on MAPREDUCE-1685: -------------------------------------- Any more details? Which version of hadoop the 15% is profied on? > Debug statements affecting performance of JobTracker.heartbeat > -------------------------------------------------------------- > > Key: MAPREDUCE-1685 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-1685 > Project: Hadoop Map/Reduce > Issue Type: Bug > Reporter: Vinod K V > > Several debug statements that come in the critical section in JobTracker.heartbeat() are not protected by a LOG.isDebugEnabled() and so incur non-trivial costs, in the order of 15% of the total heartbeat processing time. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.