RES: Context switching

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi,
 
Sorry, but this message was already post some days before!
 
Thank you!
 
Carlos
 
-----Mensagem original-----
De: pgsql-performance-owner@xxxxxxxxxxxxxx [mailto:pgsql-performance-owner@xxxxxxxxxxxxxx]Em nome de Carlos H. Reimer
Enviada em: quarta-feira, 1 de novembro de 2006 03:23
Para: pgsql-performance@xxxxxxxxxxxxxx
Assunto: [PERFORM] Context switching

Hi,
 
We've migrated one of our servers from pg 7.4 to 8.1 and from times to times (4 hours) the server start doing a lot of context switching and all transactions become very slow.
 
The average context switching for this server as vmstat shows is 1 but when the problem occurs it goes to 250000.
 
CPU and memory usage are ok.
 
What can produce this context switching storms?
 
It is a box with 12GB RAM and 4 processors running RedHat Enterprise Linux AS.
 
Thank you in advance!

Reimer
carlos.reimer@xxxxxxxxxxxxx
OpenDB Serviços e Treinamentos PostgreSQL e DB2
Fone: 47 3327-0878 Cel: 47 9602-0151
www.opendb.com.br

 

[Postgresql General]     [Postgresql PHP]     [PHP Users]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Yosemite]

  Powered by Linux