Re: Cassandra causing very high load on CPU's 0.6.3
On 05/12/2011 04:08 PM, Ali Ahsan wrote: Hi All I am experience some problem with me two Cassandra node with RF=2,Both node CPU's usage is very high,load average: 9.47, 5.72, 5.11 and this causing my application to time out .I have xeon with 8 processor and 16 GB of Ram.and LVM setup for Cassandra.How can i trace the main issue of load i have no swap and swappies also set to 0.I am running Centos 5.5 64 Bit. Add to this i am using openjdk not sunjdk will this be an issue ?
Re: Cassandra causing very high load on CPU's 0.6.3
On Thu, May 12, 2011 at 6:04 PM, Ali Ahsan ali.ah...@panasiangroup.com wrote: On 05/12/2011 04:08 PM, Ali Ahsan wrote: Hi All I am experience some problem with me two Cassandra node with RF=2,Both node CPU's usage is very high,load average: 9.47, 5.72, 5.11 and this causing my application to time out .I have xeon with 8 processor and 16 GB of Ram.and LVM setup for Cassandra.How can i trace the main issue of load i have no swap and swappies also set to 0.I am running Centos 5.5 64 Bit. Add to this i am using openjdk not sunjdk will this be an issue ? It is indeed advised to use sunjdk as openjdk is a bit behind as far as bug fixes are concerned. Moreover, 0.6.3 is pretty old now and we do have fixed a number of issue related to load spikes, so before investigating further the best advice I can give you is to upgrade (either to 0.6.13 if you really feel like staying on 0.6, or to 0.7.5). -- Sylvain
Re: Cassandra causing very high load on CPU's 0.6.3
https://svn.apache.org/repos/asf/cassandra/tags/cassandra-0.6.13/CHANGES.txt On Thu, May 12, 2011 at 11:56 AM, Ali Ahsan ali.ah...@panasiangroup.com wrote: It is indeed advised to use sunjdk as openjdk is a bit behind as far as bug fixes are concerned. Moreover, 0.6.3 is pretty old now and we do have fixed a number of issue related to load spikes, so before investigating further the best advice I can give you is to upgrade (either to 0.6.13 if you really feel like staying on 0.6, or to 0.7.5). Thanks let me discussed that with my team.How many changes and where do we need. -- S.Ali Ahsan Senior System Engineer e-Business (Pvt) Ltd 49-C Jail Road, Lahore, P.O. Box 676 Lahore 54000, Pakistan Tel: +92 (0)42 3758 7140 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions. -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
