Return-Path: X-Original-To: apmail-pig-dev-archive@www.apache.org Delivered-To: apmail-pig-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 F16BF18245 for ; Wed, 10 Feb 2016 16:13:18 +0000 (UTC) Received: (qmail 12544 invoked by uid 500); 10 Feb 2016 16:13:18 -0000 Delivered-To: apmail-pig-dev-archive@pig.apache.org Received: (qmail 12401 invoked by uid 500); 10 Feb 2016 16:13:18 -0000 Mailing-List: contact dev-help@pig.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@pig.apache.org Delivered-To: mailing list dev@pig.apache.org Received: (qmail 12318 invoked by uid 500); 10 Feb 2016 16:13:18 -0000 Delivered-To: apmail-hadoop-pig-dev@hadoop.apache.org Received: (qmail 12309 invoked by uid 99); 10 Feb 2016 16:13:18 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 10 Feb 2016 16:13:18 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id 292502C1F68 for ; Wed, 10 Feb 2016 16:13:18 +0000 (UTC) Date: Wed, 10 Feb 2016 16:13:18 +0000 (UTC) From: "Rohini Palaniswamy (JIRA)" To: pig-dev@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (PIG-4802) Autoparallelism should estimate less when there is combiner 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/PIG-4802?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Rohini Palaniswamy updated PIG-4802: ------------------------------------ Status: Patch Available (was: Open) > Autoparallelism should estimate less when there is combiner > ----------------------------------------------------------- > > Key: PIG-4802 > URL: https://issues.apache.org/jira/browse/PIG-4802 > Project: Pig > Issue Type: Improvement > Reporter: Rohini Palaniswamy > Assignee: Rohini Palaniswamy > Fix For: 0.16.0 > > Attachments: PIG-4802-1.patch > > > When there is a combiner, it reduces records by a lot. Auto-parallelism should take that into account. > Also currently we multiply by a factor of 10 if there is any FLATTEN. Users usually have FLATTEN(group) when the group by key is a compound key and it ends up estimating high. Only FLATTEN of bag should be considered. -- This message was sent by Atlassian JIRA (v6.3.4#6332)