Return-Path: X-Original-To: apmail-hbase-issues-archive@www.apache.org Delivered-To: apmail-hbase-issues-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id B5E17100F0 for ; Tue, 28 Jan 2014 19:28:55 +0000 (UTC) Received: (qmail 18465 invoked by uid 500); 28 Jan 2014 19:28:48 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 18368 invoked by uid 500); 28 Jan 2014 19:28:46 -0000 Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@hbase.apache.org Received: (qmail 18297 invoked by uid 99); 28 Jan 2014 19:28:43 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 28 Jan 2014 19:28:43 +0000 Date: Tue, 28 Jan 2014 19:28:43 +0000 (UTC) From: "Lars Hofhansl (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Comment Edited] (HBASE-10421) Investigate scan performance in 0.96 and later 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/HBASE-10421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13884467#comment-13884467 ] Lars Hofhansl edited comment on HBASE-10421 at 1/28/14 7:28 PM: ---------------------------------------------------------------- I redid the test and this time I compiled everything myself. 0.98 is just as fast as 0.94 for my test (and both are slightly faster than 0.96). All is good. was (Author: lhofhansl): I redid the test and this time I compiled everything myself. 0.98 is just as fast as 0.94 for my test (and both are slightly faster than 0.94). All is good. > Investigate scan performance in 0.96 and later > ---------------------------------------------- > > Key: HBASE-10421 > URL: https://issues.apache.org/jira/browse/HBASE-10421 > Project: HBase > Issue Type: Bug > Affects Versions: 0.98.0 > Reporter: Lars Hofhansl > > Testing the "internal friction" of scanning in HBase (all data in the block cache, and all rows filtered at the server by a ValueFilter, so that one really measures the work HBase does internally), I found that 0.98 is almost 35% slower than 0.94. > Scanning 50m rows (one col each, 8 byte keys, 8 byte values) takes 13.2 in 0.94.17-SNAPSHOT and 18.5s in 0.98. > This probably came about with all the protobuf changes in 0.96. > It should be possible to bring back to par with 0.94. -- This message was sent by Atlassian JIRA (v6.1.5#6160)