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 1DD706AC8 for ; Wed, 27 Jul 2011 19:10:33 +0000 (UTC) Received: (qmail 62920 invoked by uid 500); 27 Jul 2011 19:10:32 -0000 Delivered-To: apmail-hive-dev-archive@hive.apache.org Received: (qmail 62669 invoked by uid 500); 27 Jul 2011 19:10:31 -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 62651 invoked by uid 500); 27 Jul 2011 19:10:31 -0000 Delivered-To: apmail-hadoop-hive-dev@hadoop.apache.org Received: (qmail 62644 invoked by uid 99); 27 Jul 2011 19:10:31 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 27 Jul 2011 19:10:31 +0000 X-ASF-Spam-Status: No, hits=-2001.2 required=5.0 tests=ALL_TRUSTED,RP_MATCHES_RCVD X-Spam-Check-By: apache.org Received: from [140.211.11.116] (HELO hel.zones.apache.org) (140.211.11.116) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 27 Jul 2011 19:10:30 +0000 Received: from hel.zones.apache.org (hel.zones.apache.org [140.211.11.116]) by hel.zones.apache.org (Postfix) with ESMTP id D62A48D365 for ; Wed, 27 Jul 2011 19:10:09 +0000 (UTC) Date: Wed, 27 Jul 2011 19:10:09 +0000 (UTC) From: "Patrick Angeles (JIRA)" To: hive-dev@hadoop.apache.org Message-ID: <1876648919.12921.1311793809874.JavaMail.tomcat@hel.zones.apache.org> In-Reply-To: <1666557716.12875.1311793089477.JavaMail.tomcat@hel.zones.apache.org> Subject: [jira] [Updated] (HIVE-2316) MapJoin optimizer can make the wrong decision on compressed tables 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-2316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Patrick Angeles updated HIVE-2316: ---------------------------------- Description: With hive.auto.convert.join = true, it appears that when the small tables are compressed, the optimizer cannot properly guess the size of the in-memory tables. It proceeds with a MapJoin based on the compressed size, instead of falling back to a CommonJoin. This can sometimes result in a OOME from the map tasks. was:With hive.auto.convert.join = true, it appears that when the small tables are compressed, the optimizer cannot properly guess the size of the in-memory tables. It proceeds with a MapJoin based on the compressed size, instead of falling back to a CommonJoin. > MapJoin optimizer can make the wrong decision on compressed tables > ------------------------------------------------------------------ > > Key: HIVE-2316 > URL: https://issues.apache.org/jira/browse/HIVE-2316 > Project: Hive > Issue Type: Bug > Reporter: Patrick Angeles > > With hive.auto.convert.join = true, it appears that when the small tables are compressed, the optimizer cannot properly guess the size of the in-memory tables. It proceeds with a MapJoin based on the compressed size, instead of falling back to a CommonJoin. > This can sometimes result in a OOME from the map tasks. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira