Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 41086 invoked from network); 12 May 2010 10:45:58 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 12 May 2010 10:45:58 -0000 Received: (qmail 2883 invoked by uid 500); 12 May 2010 10:45:57 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 2708 invoked by uid 500); 12 May 2010 10:45:54 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 2692 invoked by uid 99); 12 May 2010 10:45:53 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 12 May 2010 10:45:53 +0000 X-ASF-Spam-Status: No, hits=2.2 required=10.0 tests=FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of rantav@gmail.com designates 209.85.160.44 as permitted sender) Received: from [209.85.160.44] (HELO mail-pw0-f44.google.com) (209.85.160.44) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 12 May 2010 10:45:45 +0000 Received: by pwi1 with SMTP id 1so512290pwi.31 for ; Wed, 12 May 2010 03:45:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:received :in-reply-to:references:date:message-id:subject:from:to:content-type; bh=1JVq1WLoev9ziMefllUJLCBiXB3ccX7xObcR3WekVf4=; b=chSSSI90q5uM4voLP7KjDd4ARmu5W7vQRhiyBIRPvT1Ne392jPIAZTk7VYmnXf1FY3 cWtsNWYhHsvHSSNAOlgtVzTf0mtm8QFMfin7SyBs7AeDI+9PgcQPezvv+U7Ro3S7J1nw ngtMIPMFmIxzcxoKi4sMT1z2TTdsE1gHfZB/0= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=mRFrkR7lnsmV6q2YBk+Jj/q5RZ5Fku9ziNRSYY0oA7djwKKI5LE95iVJmqwNJEN0Lx yUvS7YIyxLgpw3xMV0oq9Jyt+CR9NRc8FXdj0sP0XRoT/+U0eRtrqgGl1o7VQmZ7WCNr lwtD0gTf7oc1lFFxzvCN2incSuU1ZGylbYJBg= MIME-Version: 1.0 Received: by 10.142.151.5 with SMTP id y5mr5046789wfd.190.1273661123606; Wed, 12 May 2010 03:45:23 -0700 (PDT) Received: by 10.142.242.20 with HTTP; Wed, 12 May 2010 03:45:23 -0700 (PDT) Received: by 10.142.242.20 with HTTP; Wed, 12 May 2010 03:45:23 -0700 (PDT) In-Reply-To: References: Date: Wed, 12 May 2010 13:45:23 +0300 Message-ID: Subject: Re: what/how do you guys monitor "slow" nodes? From: Ran Tavory To: user@cassandra.apache.org Content-Type: multipart/alternative; boundary=000e0cd312d6d637f60486635673 X-Virus-Checked: Checked by ClamAV on apache.org --000e0cd312d6d637f60486635673 Content-Type: text/plain; charset=UTF-8 There is a per cf read and write latency jmx. On May 12, 2010 12:55 AM, "Jordan Pittier - Rezel" wrote: For sure you have to pay particular attention to memory allocation on each node, especially be sure your servers dont swap. Then you can monitor how load are balanced among your nodes (nodetools -h XX ring). On Tue, May 11, 2010 at 11:46 PM, S Ahmed wrote: > > If you have 3-4 nodes,... --000e0cd312d6d637f60486635673 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

There is a per cf read and write latency jmx.

On May 12, 2010 12:55 AM, "Jordan Pittier= - Rezel" <jordan@rezel.net= > wrote:

For sure you have to pay particular attention to memory = allocation on each node, especially be sure your servers dont swap. Then yo= u can monitor how load are balanced among your nodes (nodetools -h XX ring)= .



On Tue, May 11, 2010 at 11:46 PM, S Ahmed &= lt;sahmed1020@gmail.com> wro= te:
>
> If you have 3-4 nodes,...

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