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 3489B186F3 for ; Wed, 14 Oct 2015 15:40:07 +0000 (UTC) Received: (qmail 63512 invoked by uid 500); 14 Oct 2015 15:40:07 -0000 Delivered-To: apmail-cassandra-commits-archive@cassandra.apache.org Received: (qmail 63481 invoked by uid 500); 14 Oct 2015 15:40:07 -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 63400 invoked by uid 99); 14 Oct 2015 15:40:07 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 14 Oct 2015 15:40:06 +0000 Date: Wed, 14 Oct 2015 15:40:06 +0000 (UTC) From: "Carl Yeksigian (JIRA)" To: commits@cassandra.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Resolved] (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:all-tabpanel ] Carl Yeksigian resolved CASSANDRA-9345. --------------------------------------- Resolution: Duplicate I'm going to close this issue and address it as part of the overall CASSANDRA-7409 ticket. > 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 > Attachments: temperature.yaml > > > --> This issue doesn't affect any release and is only reproducible in a dev branch > 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. > Here are the graphs that compare 2.1 vs the dev branch (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)