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 ABDB8109B5 for ; Sat, 1 Mar 2014 03:06:24 +0000 (UTC) Received: (qmail 18918 invoked by uid 500); 1 Mar 2014 03:06:22 -0000 Delivered-To: apmail-hive-dev-archive@hive.apache.org Received: (qmail 18242 invoked by uid 500); 1 Mar 2014 03:06:21 -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 17934 invoked by uid 500); 1 Mar 2014 03:06:20 -0000 Delivered-To: apmail-hadoop-hive-dev@hadoop.apache.org Received: (qmail 17926 invoked by uid 99); 1 Mar 2014 03:06:20 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 01 Mar 2014 03:06:20 +0000 Date: Sat, 1 Mar 2014 03:06:20 +0000 (UTC) From: "Sergey Shelukhin (JIRA)" To: hive-dev@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HIVE-6429) MapJoinKey has large memory overhead in typical cases 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-6429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Sergey Shelukhin updated HIVE-6429: ----------------------------------- Attachment: HIVE-6429.10.patch RB feedback + some internal discussion; mostly moving some key-specific stuff to key, and changing the vectorization path to go thru the elaborate writer/writable/oi path, and not raw values. Few tez tests appear to pass, I'll run the rest > MapJoinKey has large memory overhead in typical cases > ----------------------------------------------------- > > Key: HIVE-6429 > URL: https://issues.apache.org/jira/browse/HIVE-6429 > Project: Hive > Issue Type: Improvement > Reporter: Sergey Shelukhin > Assignee: Sergey Shelukhin > Attachments: HIVE-6429.01.patch, HIVE-6429.02.patch, HIVE-6429.03.patch, HIVE-6429.04.patch, HIVE-6429.05.patch, HIVE-6429.06.patch, HIVE-6429.07.patch, HIVE-6429.08.patch, HIVE-6429.09.patch, HIVE-6429.10.patch, HIVE-6429.WIP.patch, HIVE-6429.patch > > > The only thing that MJK really needs it hashCode and equals (well, and construction), so there's no need to have array of writables in there. Assuming all the keys for a table have the same structure, for the common case where keys are primitive types, we can store something like a byte array combination of keys to reduce the memory usage. Will probably speed up compares too. -- This message was sent by Atlassian JIRA (v6.1.5#6160)