Return-Path: X-Original-To: apmail-hive-dev-archive@www.apache.org Delivered-To: apmail-hive-dev-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 9606610F6D for ; Sat, 20 Apr 2013 20:53:16 +0000 (UTC) Received: (qmail 46316 invoked by uid 500); 20 Apr 2013 20:53:16 -0000 Delivered-To: apmail-hive-dev-archive@hive.apache.org Received: (qmail 46165 invoked by uid 500); 20 Apr 2013 20:53:16 -0000 Mailing-List: contact dev-help@hive.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@hive.apache.org Delivered-To: mailing list dev@hive.apache.org Received: (qmail 46156 invoked by uid 500); 20 Apr 2013 20:53:16 -0000 Delivered-To: apmail-hadoop-hive-dev@hadoop.apache.org Received: (qmail 46153 invoked by uid 99); 20 Apr 2013 20:53:16 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 20 Apr 2013 20:53:16 +0000 Date: Sat, 20 Apr 2013 20:53:16 +0000 (UTC) From: "Ashutosh Chauhan (JIRA)" To: hive-dev@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HIVE-4103) Remove System.gc() call from the map-join local-task loop 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/HIVE-4103?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Ashutosh Chauhan updated HIVE-4103: ----------------------------------- Resolution: Fixed Fix Version/s: 0.12.0 Status: Resolved (was: Patch Available) Committed to trunk. Thanks, Gopal and Gunther! > Remove System.gc() call from the map-join local-task loop > --------------------------------------------------------- > > Key: HIVE-4103 > URL: https://issues.apache.org/jira/browse/HIVE-4103 > Project: Hive > Issue Type: Bug > Reporter: Gopal V > Assignee: Gopal V > Priority: Minor > Fix For: 0.12.0 > > Attachments: HIVE-4103.patch > > > Hive's HashMapWrapper calls System.gc() twice within the HashMapWrapper::isAbort() which produces a significant slow-down during the loop. > {code} > 2013-03-01 04:54:28 The gc calls took 677 ms > 2013-03-01 04:54:28 Processing rows: 200000 Hashtable size: 199999 Memory usage: 62955432 rate: 0.033 > 2013-03-01 04:54:31 The gc calls took 956 ms > 2013-03-01 04:54:31 Processing rows: 300000 Hashtable size: 299999 Memory usage: 90826656 rate: 0.048 > 2013-03-01 04:54:33 The gc calls took 967 ms > 2013-03-01 04:54:33 Processing rows: 384160 Hashtable size: 384160 Memory usage: 114412712 rate: 0.06 > {code} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira