Return-Path: X-Original-To: apmail-hbase-user-archive@www.apache.org Delivered-To: apmail-hbase-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 912D348A2 for ; Tue, 17 May 2011 02:41:42 +0000 (UTC) Received: (qmail 69538 invoked by uid 500); 17 May 2011 02:41:41 -0000 Delivered-To: apmail-hbase-user-archive@hbase.apache.org Received: (qmail 68989 invoked by uid 500); 17 May 2011 02:41:41 -0000 Mailing-List: contact user-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hbase.apache.org Delivered-To: mailing list user@hbase.apache.org Received: (qmail 68981 invoked by uid 99); 17 May 2011 02:41:39 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 17 May 2011 02:41:39 +0000 X-ASF-Spam-Status: No, hits=0.7 required=5.0 tests=RCVD_IN_DNSWL_NONE,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (athena.apache.org: local policy) Received: from [98.139.52.198] (HELO nm1.bullet.mail.ac4.yahoo.com) (98.139.52.198) by apache.org (qpsmtpd/0.29) with SMTP; Tue, 17 May 2011 02:41:31 +0000 Received: from [98.139.52.188] by nm1.bullet.mail.ac4.yahoo.com with NNFMP; 17 May 2011 02:41:10 -0000 Received: from [98.139.52.167] by tm1.bullet.mail.ac4.yahoo.com with NNFMP; 17 May 2011 02:41:10 -0000 Received: from [127.0.0.1] by omp1050.mail.ac4.yahoo.com with NNFMP; 17 May 2011 02:41:10 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 382417.41087.bm@omp1050.mail.ac4.yahoo.com Received: (qmail 47806 invoked by uid 60001); 17 May 2011 02:41:10 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1305600070; bh=rOEc2VpWyyjgoltC5sbotxAfgp4Dn9g1RAvEm1CcsGQ=; h=Message-ID:X-YMail-OSG:Received:X-RocketYMMF:X-Mailer:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=CMvExvCVSYhDPpNFLrhmufrd8XNYBetY3zFBO9q8/kMMBO71GPpn4iTbq0KPKynLA9hK4BGjgs5UmIoFUW2dvZGV/CZCfdNqMcHgMPa6g2QS1OyodpBQi9KoS9xtsSpQiK/Q5BgKrlAUe98+D5qGljACxiTwE6k2Khn1sCQXTrc= Message-ID: <105053.14845.qm@web65508.mail.ac4.yahoo.com> X-YMail-OSG: FqnCOD4VM1lTXG.520WbXgHNRihq7udSLqMbgziD89lyxeN s98znsWZNxYB32Jp8ynBzVLzu2LwCECxQi8YJw4dE22owUbdVNidLb_Y.LIj 72hcrV10QqhXJNL0hz2UILjvggORgh9nMOr3Ms9lrPcK2RTUfuRSyPuHGd9Z 7FqvKMeppgOm6.TEI87MjgTMRk_7mnGieTDALtWOuvP3cZvGE_enXVTvYVsK vAaqyfpFBuWsJ53fo2sAxRDjTtfN2rKZ2prWBK9vQTNLXRaGXl8mR0T_AOPw t9g0tIcYDFLsBB1Jkxdch5bSy7_pbo2_dDZASB2.ugUFrApNHnuBjW5MeF5d LJAKhbCBSpEEdQ3jX6VVbDEJGb0vwtXHAnm5_dcrXkfpRbIyOe_pgKoTYSd5 E8eTjjESblt9a Received: from [220.135.41.196] by web65508.mail.ac4.yahoo.com via HTTP; Mon, 16 May 2011 19:41:10 PDT X-RocketYMMF: apurtell X-Mailer: YahooMailClassic/12.0.2 YahooMailWebService/0.8.111.303096 Date: Mon, 16 May 2011 19:41:10 -0700 (PDT) From: Andrew Purtell Reply-To: apurtell@apache.org Subject: Re: GC and High CPU To: user@hbase.apache.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable This is interesting because our "conventional wisdom" is those settings sho= uld increase the chance of stop-the-world GC and should be avoided.=0A=0A = - Andy=0A (who always gets nervous when we start talking about GC black = magic)=0A=0A> From: Jack Levin =0A> Subject: Re: GC and = High CPU=0A> To: user@hbase.apache.org=0A> Date: Monday, May 16, 2011, 5:06= PM=0A>=0A> Those are the lines I added:=0A> =0A> -XX:+CMSIncrementalMode \= =A0 <--------=0A> -XX:+CMSIncrementalPacing \ <-------=0A> -XX:-TraceClassU= nloading <------=0A> =0A> -Jack=0A> (used CMS before)=0A> =0A> On Mon, May = 16, 2011 at 4:19 PM, Stack =0A> wrote:=0A> > So, the chan= ge is that you started using CMS? =A0You=0A> > were using the default GC pr= evious?=0A> >=0A> > ParNew is much bigger now.=0A