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From "Nir Cohen" <...@similargroup.com>
Subject RE: Performance issues after upgrading to Cassandra 0.7.6-2 from Cassandra 0.6.6
Date Fri, 03 Jun 2011 08:50:03 GMT
I think that the problem was solved.

The servers have 8G Ram, we changed the heap to 6 (instead of 4G),

Thanks

 

Kind regards,

-Nir

 


SG_Signature_Logo.png

Nir Cohen 


Co-Founder & CTO 


(+972) 54-242-8419 


SimilarWeb <http://www.similarweb.com/>  | SimilarSites
<http://www.similarsites.com/>  | TopSite <http://www.topsite.com/> 

 

 

From: Jonathan Ellis [mailto:jbellis@gmail.com] 
Sent: Friday, June 03, 2011 2:41 AM
To: user@cassandra.apache.org
Subject: Re: Performance issues after upgrading to Cassandra 0.7.6-2 from
Cassandra 0.6.6

 

Where is the bottleneck? See
http://spyced.blogspot.com/2010/01/linux-performance-basics.html

On Thu, Jun 2, 2011 at 11:18 AM, Nir Cohen <nir@similargroup.com> wrote:

Hi all,

Recently we have upgraded our Cassandra servers to version 0.7.6-2 from
0.6.6

We are experiencing a severe performance issues - we must restart the
Cassandra servers every half hour (otherwise our apps servers can't connect
to the Cassandra servers).

Each Cassandra server has 2 SSD drives (one for data and one for commit
log),

The amount of the read per second for each server is 500.

We haven't experienced those issues in 0.6.6 

 

Do you have any ideas?

 

Kind regards,

-Nir

 


SG_Signature_Logo.png

Nir Cohen 


Co-Founder & CTO 


(+972) 54-242-8419 <tel:%28%2B972%29%2054-242-8419>  


SimilarWeb <http://www.similarweb.com/>  | SimilarSites
<http://www.similarsites.com/>  | TopSite <http://www.topsite.com/> 

 

 




-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com


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