Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 71400 invoked from network); 17 Feb 2011 20:34:39 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 17 Feb 2011 20:34:39 -0000 Received: (qmail 11102 invoked by uid 500); 17 Feb 2011 20:34:37 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 11047 invoked by uid 500); 17 Feb 2011 20:34:36 -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 11039 invoked by uid 99); 17 Feb 2011 20:34:36 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 17 Feb 2011 20:34:36 +0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 tests=FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of victor.kabdebon@gmail.com designates 209.85.161.44 as permitted sender) Received: from [209.85.161.44] (HELO mail-fx0-f44.google.com) (209.85.161.44) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 17 Feb 2011 20:34:31 +0000 Received: by fxm9 with SMTP id 9so3166891fxm.31 for ; Thu, 17 Feb 2011 12:34:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:from:date :message-id:subject:to:content-type; bh=ZXJPNKhGZwWqt3mfg3KQq24u5/TIlF14nztelEW1f6s=; b=sTDsor8y5aGhPBmbP8DsSVI0QFAKoQxsXF9/pah8Pno2Kjdt/yRniWXe5MUnpRt9da R1c5SWUr0rM7x9PtSpnTuKiLBUNmUOAOQtggKz8AJATHr+uTCVAJlmS8+gJneCh0huq8 ST52f2knbECviQ/x253R7xaI5o+dejwtVqS3Q= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; b=AosIp8BdCM/o8ELhlbr1hTqUFcANPcBHwmqaCSEMgNMRoUA9H+LJArNgUVipB1/OMx 8mx69hh5C7lJRCHvvo0KTZrrfBWPOHUC+c6hEwa9tCY2ufJkwKYYzj7wMoIuPV5vmbd6 VhbNn8aSHckPZW1lwPf75FMYXMjrOB5GiNtqM= Received: by 10.223.83.134 with SMTP id f6mr644984fal.1.1297974850054; Thu, 17 Feb 2011 12:34:10 -0800 (PST) MIME-Version: 1.0 Received: by 10.223.107.197 with HTTP; Thu, 17 Feb 2011 12:33:49 -0800 (PST) In-Reply-To: References: From: Victor Kabdebon Date: Thu, 17 Feb 2011 15:33:49 -0500 Message-ID: Subject: Re: memory consuption To: user@cassandra.apache.org Content-Type: multipart/alternative; boundary=20cf30434508dd6bfe049c80512d --20cf30434508dd6bfe049c80512d Content-Type: text/plain; charset=ISO-8859-1 Oh right but Cassandra doesn't really respect that, I thought there was another option to set that. Just for your information, I set xms and xmx very low with a small amount of data. I am waiting to be able to connect jconsole, I don't know why it is not reachable at the moment. Here is my result : 105 26115 0.2 27.3 1125328 755316 ? Sl Feb09 23:58 /usr/bin/java -ea -Xms64M -Xmx128M 2011/2/17 Aaron Morton > bin/cassandra.in.sh > set Xms and Xmx in the JVM_OPTS > > Aaron > > > On 18 Feb, 2011,at 09:10 AM, Victor Kabdebon > wrote: > > Is it possible to change the maximum JVM heap memory use in 0.6.X ? > > 2011/2/17 Aaron Morton > >> What are you using for disk_access_mode ? >> Have you tried reducing the JVM head size? >> Have you added the Jna.jar file to lib/ ? This will allow Cassandra to >> lock the JVM memory. >> >> >> Aaron >> >> >> >> On 17/02/2011, at 9:20 PM, ruslan usifov wrote: >> >> >> >> >> >> 2011/2/16 Aaron Morton < aaron@thelastpickle.com >> > >> >>> JVM heap memory is controlled by the settings in conf/Cassandra-env.sh >>> >>> Memory mapped files will use additional virtual memory, is controlled in >>> conf/Cassandra.yaml disk_access_mode >>> >>> >> And??? JVM memory heap in cassandra 0.7 is by default half of memory is >> system in my case 4GB, here is a part of cassandra-env.sh: >> >> calculate_heap_size() >> { >> case "`uname`" in >> Linux) >> system_memory_in_mb=`free -m | awk '/Mem:/ {print $2}'` >> MAX_HEAP_SIZE=$((system_memory_in_mb / 2))M >> return 0 >> ;; >> FreeBSD) >> system_memory_in_bytes=`sysctl hw.physmem | awk '{print $2}'` >> MAX_HEAP_SIZE=$((system_memory_in_bytes / 1024 / 1024 / 2))M >> return 0 >> ;; >> *) >> MAX_HEAP_SIZE=1024M >> return 1 >> ;; >> esac >> } >> >> >> >> I set all this options by default. All my nodes have 8GB of memory. And i >> affraid that after some time all my nodes goes to hard swap, and only reboot >> help them :-((( >> >> PS: as i understand that down sometime of cassandra is normal? >> >> > --20cf30434508dd6bfe049c80512d Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Oh right but Cassandra doesn't really respect that, I thought there was= another option to set that.

Just for your information, = I set xms and xmx very low with a small amount of data. I am waiting to be = able to connect jconsole, I don't know why it is not reachable at the m= oment. Here is my result :


105 =A0 =A0 =A026115 =A00.2 27.3 1125328 755316 ? = =A0 =A0 =A0Sl =A0 Feb09 =A023:58 /usr/bin/java -ea -Xms64M -Xmx128M

2011/2/17 Aaron Morton &l= t;aaron@thelastpickle.com>= ;
set Xms and Xmx in= the JVM_OPTS

Aaron


On 18 Feb, 2011,at 09:10 AM, Victor Kabdebon <victor.kabdebon= @gmail.com> wrote:

Is it possible to change the maximum JVM heap memory use i= n 0.6.X ?

2011/2/17 Aaron Morton <= aaron@thelastpickle.com>
What are you using for disk_access= _mode ?
Have you tried reducing the JVM head size?
Have you added the Jna.jar file to lib/ ? This will allow Cassandra to= lock the JVM memory.


Aaron



On 17/02/2011, at 9:20 PM, ruslan usifov <ruslan.usifov@gmail= .com> wrote:





2011/2/16 Aaron Morton= <a= aron@thelastpickle.com>
JVM heap memory is controlled by the settings in conf/Cassandra-env.sh

Memory mapped files will use additional virtual memory, is controlled in co= nf/Cassandra.yaml disk_access_mode


And??? JVM memory= heap in cassandra 0.7 is by default half of memory is system in my case 4G= B, here is a part of cassandra-env.sh:

calculate_heap_size()
{ =A0=A0=A0 case "`uname`" in
=A0=A0=A0=A0=A0=A0=A0 Linux)
= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 system_memory_in_mb=3D`free -m | awk '= ;/Mem:/ {print $2}'`
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 MAX_HEAP_SIZE= =3D$((system_memory_in_mb / 2))M
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 retur= n 0
=A0=A0=A0=A0=A0=A0=A0 ;;
=A0=A0=A0=A0=A0=A0=A0 FreeBSD)
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 system_= memory_in_bytes=3D`sysctl hw.physmem | awk '{print $2}'`
=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0 MAX_HEAP_SIZE=3D$((system_memory_in_bytes / 102= 4 / 1024 / 2))M
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 return 0
=A0=A0=A0= =A0=A0=A0=A0 ;;
=A0=A0=A0=A0=A0=A0=A0 *)
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 MAX_HEAP_SIZE=3D1024M
=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0 return 1
=A0=A0=A0=A0=A0=A0=A0 ;;
=A0=A0=A0 esac}



I set all this options by default. All my nodes have 8GB= of memory. And i affraid that after some time all my nodes goes to hard sw= ap, and only reboot help them :-(((

PS: as i understand that down sometime of cassandra is normal?


--20cf30434508dd6bfe049c80512d--