Return-Path: X-Original-To: apmail-impala-dev-archive@minotaur.apache.org Delivered-To: apmail-impala-dev-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 4285718FAB for ; Mon, 7 Mar 2016 21:45:19 +0000 (UTC) Received: (qmail 20467 invoked by uid 500); 7 Mar 2016 21:45:19 -0000 Delivered-To: apmail-impala-dev-archive@impala.apache.org Received: (qmail 20426 invoked by uid 500); 7 Mar 2016 21:45:19 -0000 Mailing-List: contact dev-help@impala.incubator.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@impala.incubator.apache.org Delivered-To: mailing list dev@impala.incubator.apache.org Received: (qmail 20415 invoked by uid 99); 7 Mar 2016 21:45:18 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd1-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 07 Mar 2016 21:45:18 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd1-us-west.apache.org (ASF Mail Server at spamd1-us-west.apache.org) with ESMTP id 8C07DC1DFE for ; Mon, 7 Mar 2016 21:45:18 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: 0.362 X-Spam-Level: X-Spam-Status: No, score=0.362 tagged_above=-999 required=6.31 tests=[RDNS_DYNAMIC=0.363, SPF_PASS=-0.001] autolearn=disabled Received: from mx1-lw-us.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id qZ0SovAIwwSM for ; Mon, 7 Mar 2016 21:45:16 +0000 (UTC) Received: from ip-10-146-233-104.ec2.internal (ec2-75-101-130-251.compute-1.amazonaws.com [75.101.130.251]) by mx1-lw-us.apache.org (ASF Mail Server at mx1-lw-us.apache.org) with ESMTPS id 8D9365FBB9 for ; Mon, 7 Mar 2016 21:45:16 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by ip-10-146-233-104.ec2.internal (8.14.4/8.14.4) with ESMTP id u27LjFNR020086; Mon, 7 Mar 2016 21:45:15 GMT Message-Id: <201603072145.u27LjFNR020086@ip-10-146-233-104.ec2.internal> Date: Mon, 7 Mar 2016 21:45:15 +0000 From: "Jim Apple (Code Review)" To: Jim Apple , impala-cr@cloudera.com, dev@impala.incubator.apache.org CC: Marcel Kornacker , Mostafa Mokhtar , Tim Armstrong Reply-To: jbapple@cloudera.com X-Gerrit-MessageType: abandon Subject: =?UTF-8?Q?[Impala-CR](cdh5-trunk)_IMPALA-2653:_COUNT_DISTINCT_performance_is_not_monotonic.=0A?= X-Gerrit-Change-Id: I9bcac97424c366121c480c3cb48400a44bffd69f X-Gerrit-ChangeURL: X-Gerrit-Commit: 8d70f50c3f2610d2001ae067daf57b22a61e9412 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Content-Disposition: inline User-Agent: Gerrit/2.10-rc0 Jim Apple has abandoned this change. Change subject: IMPALA-2653: COUNT DISTINCT performance is not monotonic. ...................................................................... Abandoned This may have some performance benefits (10-20%) on some select queries on a single node, but it's a wash on most queries and the underlying bug is no longer reproducable. -- To view, visit http://gerrit.cloudera.org:8080/1519 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: abandon Gerrit-Change-Id: I9bcac97424c366121c480c3cb48400a44bffd69f Gerrit-PatchSet: 9 Gerrit-Project: Impala Gerrit-Branch: cdh5-trunk Gerrit-Owner: Jim Apple Gerrit-Reviewer: Jim Apple Gerrit-Reviewer: Marcel Kornacker Gerrit-Reviewer: Mostafa Mokhtar Gerrit-Reviewer: Tim Armstrong