Return-Path: Delivered-To: apmail-hadoop-hbase-user-archive@minotaur.apache.org Received: (qmail 16650 invoked from network); 18 Feb 2010 20:31:30 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 18 Feb 2010 20:31:30 -0000 Received: (qmail 5101 invoked by uid 500); 18 Feb 2010 20:31:29 -0000 Delivered-To: apmail-hadoop-hbase-user-archive@hadoop.apache.org Received: (qmail 5060 invoked by uid 500); 18 Feb 2010 20:31:29 -0000 Mailing-List: contact hbase-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hbase-user@hadoop.apache.org Delivered-To: mailing list hbase-user@hadoop.apache.org Received: (qmail 5050 invoked by uid 99); 18 Feb 2010 20:31:29 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 18 Feb 2010 20:31:29 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=10.0 tests=SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of saint.ack@gmail.com designates 74.125.92.26 as permitted sender) Received: from [74.125.92.26] (HELO qw-out-2122.google.com) (74.125.92.26) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 18 Feb 2010 20:31:20 +0000 Received: by qw-out-2122.google.com with SMTP id 5so79677qwi.35 for ; Thu, 18 Feb 2010 12:30:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:message-id:subject:from:to :content-type:content-transfer-encoding; bh=bGv3GuUuvIcFYFCxj998tZKtN4ccgvPpeCwy704WBmk=; b=bGS1tGOK9QVJY4oaqGC3pyYjkrHeKDOYhEjI2mtg/ieDyfIytf8c6nse+LoDz4jQtd G37GFjWX09tGaGaNcMKOkKqjDgiYLFS2l9EKOwxWCOa4zolzgFNpnMPvmi1ElO2/jbzT r98u47/XTfSzDdu07v/ZCadIShtQiYnZUSlqY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type :content-transfer-encoding; b=gqXv7pYSAqPHGaCuUs3KKJEH8k4I+icJDP3nQbCyaN3738eFuxJ/B1/z7BhZVx8kLd YsGp8bvGmp1bzuc1R29A9/zzESce3j+RK7yAN8ivEB1wg+46WPJLlqg0EYkE/c8W+9Ef KEvVtLOcZqrs7Y4DGF8QPcmPfWLxXxmdsoOck= MIME-Version: 1.0 Sender: saint.ack@gmail.com Received: by 10.229.214.2 with SMTP id gy2mr1900693qcb.50.1266525059842; Thu, 18 Feb 2010 12:30:59 -0800 (PST) In-Reply-To: <1266508366.4688.775.camel@puma> References: <1266277557.15001.241.camel@puma> <7c457ebe1002161545o2dcb68ablc1214e07065b66c9@mail.gmail.com> <1266364786.4688.269.camel@puma> <7c962aed1002162118g5a2fdcf0sb90a4107291683e2@mail.gmail.com> <1266386398.4688.312.camel@puma> <7780666694872561304@unknownmsgid> <1266433471.4688.623.camel@puma> <7c962aed1002171131i2c3f8a6cy42a3c9250d931f92@mail.gmail.com> <7c457ebe1002171326g46de19a7s8f3a9595d9d19fe3@mail.gmail.com> <1266508366.4688.775.camel@puma> Date: Thu, 18 Feb 2010 12:30:59 -0800 X-Google-Sender-Auth: 50cffc572ef37b97 Message-ID: <7c962aed1002181230p57ebe5d3u48ce5c03e64433bd@mail.gmail.com> Subject: Re: Optimizations for random read performance From: Stack To: hbase-user@hadoop.apache.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On Thu, Feb 18, 2010 at 7:52 AM, James Baldassari wrote: > Here are the block cache hit ratio stats: > Region server 1: 99 > Region server 2: 99 > Region server 3: 99 > Region server 4: 99 > Looks like you are serving reads from cache. > Sure. =A0Here's 'top | head' for all region servers: > Region server 1: http://pastebin.com/m45e0bc2 > Region server 2: http://pastebin.com/m31868bb6 > Region server 3: http://pastebin.com/m5b1ce71f > Region server 4: http://pastebin.com/mae7326f > Severly underloaded. No 'wa' time with some decent CPU usage. As you say above, it like you have room to grow. It would seem that you are still on 64k storefile blocksize (for the reason you gave above) and yes, it doesn't sound like anything interesting going on in your regionserver files. St.Ack