Re: Cassandra and LINUX CPU Context Switches

[daemeon reiydelle]

This would be normal if the switches are user to kernel mode (disk &
network IO are kernel mode activities). If your run queue (jobs waiting to
run) is much larger than the number of cores (just a swag but less than
2-3*# of cores), you might have other issues.


*...*



*Daemeon C.M. ReiydelleUSA (+1) 415.501.0198London (+44) (0) 20 8144 9872*

On Wed, Apr 5, 2017 at 5:45 AM, William Boutin 
wrote:

> I’ve noticed that my apache-cassandra 2.2.6 process is consistently
> performing CPU Context Switches above 10,000 per second.
>
> Is this to be expected or should I be looking into ways to lower the
> number of context switches done on my Cassandra cluster?
>
> Thanks in advance.
>
>
>
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Cassandra and LINUX CPU Context Switches

[William Boutin]

I've noticed that my apache-cassandra 2.2.6 process is consistently performing 
CPU Context Switches above 10,000 per second.
Is this to be expected or should I be looking into ways to lower the number of 
context switches done on my Cassandra cluster?
Thanks in advance.

[Ericsson]

WILLIAM L. BOUTIN
Engineer IV - Sftwr
BMDA PADB DSE DU CC NGEE

Ericsson
1 Ericsson Drive, US PI06 1.S747
Piscataway, NJ, 08854, USA
Phone (913) 241-5574
Mobile (732) 213-1368
Emergency (732) 354-1263
william.bou...@ericsson.com
www.ericsson.com
[http://www.ericsson.com/current_campaign]
Legal entity: EUS - ERICSSON INC., registered office in US PI01 4A242. This 
Communication is Confidential. We only send and receive email on the basis of 
the terms set out at 
www.ericsson.com/email_disclaimer