RES: Context switching
| От | Carlos H. Reimer |
|---|---|
| Тема | RES: Context switching |
| Дата | |
| Msg-id | PEEPKDFEHHEMKBBFPOOKIEMLDGAA.carlos.reimer@opendb.com.br обсуждение исходный текст |
| Ответ на | Context switching ("Carlos H. Reimer" <carlos.reimer@opendb.com.br>) |
| Список | pgsql-performance |
Hi,
Sorry, but this message was already post some days before!
Thank you!
Carlos
-----Mensagem original-----
De: pgsql-performance-owner@postgresql.org [mailto:pgsql-performance-owner@postgresql.org]Em nome de Carlos H. Reimer
Enviada em: quarta-feira, 1 de novembro de 2006 03:23
Para: pgsql-performance@postgresql.org
Assunto: [PERFORM] Context switching
De: pgsql-performance-owner@postgresql.org [mailto:pgsql-performance-owner@postgresql.org]Em nome de Carlos H. Reimer
Enviada em: quarta-feira, 1 de novembro de 2006 03:23
Para: pgsql-performance@postgresql.org
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@opendb.com.br
OpenDB Serviços e Treinamentos PostgreSQL e DB2
Fone: 47 3327-0878 Cel: 47 9602-0151
www.opendb.com.br
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