Return-Path: X-Original-To: apmail-cassandra-commits-archive@www.apache.org Delivered-To: apmail-cassandra-commits-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 221F617EDD for ; Mon, 11 May 2015 18:19:01 +0000 (UTC) Received: (qmail 87328 invoked by uid 500); 11 May 2015 18:19:01 -0000 Delivered-To: apmail-cassandra-commits-archive@cassandra.apache.org Received: (qmail 87293 invoked by uid 500); 11 May 2015 18:19:01 -0000 Mailing-List: contact commits-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@cassandra.apache.org Delivered-To: mailing list commits@cassandra.apache.org Received: (qmail 87268 invoked by uid 99); 11 May 2015 18:19:00 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 11 May 2015 18:19:00 +0000 Date: Mon, 11 May 2015 18:19:00 +0000 (UTC) From: "Alan Boudreault (JIRA)" To: commits@cassandra.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (CASSANDRA-9345) LeveledCompactionStrategy bad performance 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/CASSANDRA-9345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14538344#comment-14538344 ] Alan Boudreault commented on CASSANDRA-9345: -------------------------------------------- [~jbellis] Tested 2.1 and I reproduce this only with trunk. (Updated the description with that info). My graphs include 2.1 AND trunk. > LeveledCompactionStrategy bad performance > ----------------------------------------- > > Key: CASSANDRA-9345 > URL: https://issues.apache.org/jira/browse/CASSANDRA-9345 > Project: Cassandra > Issue Type: Bug > Reporter: Alan Boudreault > Assignee: Carl Yeksigian > Fix For: 3.0 > > Attachments: temperature.yaml > > > While working on CASSANDRA-7409, we noticed that there were some bad performance with LCS. It seems that the compaction is not triggered as it should. The performance is really bad when using low heap but we can also see that using a big heap there are something wrong with the number of compactions. > (Take care when visualizing the graphs, the y-axis scales differ due to some peaks) > http://dl.alanb.ca/perf/lcs-2.1-vs-trunk-LH.html > http://dl.alanb.ca/perf/lcs-2.1-vs-trunk-BH.html > I've attached the stress yaml config used for this test. -- This message was sent by Atlassian JIRA (v6.3.4#6332)