Return-Path: X-Original-To: apmail-hive-user-archive@www.apache.org Delivered-To: apmail-hive-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 8A76D10582 for ; Fri, 23 Aug 2013 05:29:08 +0000 (UTC) Received: (qmail 66447 invoked by uid 500); 23 Aug 2013 05:29:02 -0000 Delivered-To: apmail-hive-user-archive@hive.apache.org Received: (qmail 66387 invoked by uid 500); 23 Aug 2013 05:28:56 -0000 Mailing-List: contact user-help@hive.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hive.apache.org Delivered-To: mailing list user@hive.apache.org Received: (qmail 66378 invoked by uid 99); 23 Aug 2013 05:28:52 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 23 Aug 2013 05:28:52 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of pandeesh@gmail.com designates 209.85.128.53 as permitted sender) Received: from [209.85.128.53] (HELO mail-qe0-f53.google.com) (209.85.128.53) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 23 Aug 2013 05:28:45 +0000 Received: by mail-qe0-f53.google.com with SMTP id 1so109632qee.40 for ; Thu, 22 Aug 2013 22:28:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=OJu6/2+pRnp7yaL3PwuZ/J/XISJg7YdUp+R/2ylPqVo=; b=DEgosHe4Bk+93btnISit7EVGyRcGC8UofnFWoR4AzkFdNOWahvYqKq0boFWS3Fl3zE MEnX6DoyY5PE4fE/Z8MhKIGiNO09DznSJADQVOyWf2rZnIDVjXNCY6bNo9EO7SpmwoMZ dflu7Cxnv+xVmLG8iNbNJ6W/wFGIErHerdo3BitTcRQmtp12AplZDbc9YCZSUHvV6R2D hGsLKcCRRhOIQNoFNybNc7i2Fj4CFa3x+7Ol/pDjScht+xwxUQDR+JbHjVAU/L6fg2bo Y0r5IGPMak+ajtDkAzMcSiB2fDifr1AD4y4T9xR+MG0HVwtRsIOSg5nNQKsLtqWj98vM K03A== MIME-Version: 1.0 X-Received: by 10.224.80.9 with SMTP id r9mr83052qak.89.1377235703445; Thu, 22 Aug 2013 22:28:23 -0700 (PDT) Received: by 10.49.49.202 with HTTP; Thu, 22 Aug 2013 22:28:23 -0700 (PDT) Date: Fri, 23 Aug 2013 10:58:23 +0530 Message-ID: Subject: Interpreting explain plan in hive From: pandees waran To: user Content-Type: text/plain; charset=UTF-8 X-Virus-Checked: Checked by ClamAV on apache.org Hi, What are the key areas we need to check in the explain plan generated in Hive? I have checked the documentation, it's not detailed about the above question. https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Explain I have similar kind of question asked in our forum, which is unanswered. http://mail-archives.apache.org/mod_mbox/hive-user/201107.mbox/%3CCAAG3+BGHadR65FnR5udmGP9=QcriHuubnR8WR-VbxczdOhA=EQ@mail.gmail.com%3E In summary, how we can distinguish a good/bad plan ? Thanks for your help. -- Thanks, Pandeeswaran