Re: Queries becoming slow under heavy load

From: "Ing(dot) Marcos Ortiz Valmaseda" <mlortiz(at)uci(dot)cu>
To: Anne Rosset <arosset(at)collab(dot)net>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Queries becoming slow under heavy load
Date: 2011-01-25 22:27:01
Message-ID: 51831170.52414881295994420979.JavaMail.root@ucimail4.uci.cu
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When you say that with a lot of concurrent access, queries get very slow, How many concurrent connections to your server have you had?
more that max_connections´value?
If you want to have many concurrent connections, you should have consider to use a pooling connection system like pgbouncer or pgpool.

Which are the values for:
- work_mem
- shared_buffers
- maintenance_work_mem
- effective_cache_size
- effective_io_concurrency
- server_version

Which are your platform?

Regards
--
Ing. Marcos Luís Ortíz Valmaseda
System Engineer -- Database Administrator

Centro de Tecnologías de Gestión de Datos (DATEC)
Universidad de las Ciencias Informáticas
http://postgresql.uci.cu

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