Re: Pgpool questions

From: Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp>
To: bmaguire(at)vantage(dot)com
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Pgpool questions
Date: 2005-04-23 23:22:33
Message-ID: 20050424.082233.102578918.t-ishii@sra.co.jp
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> I have a couple Pgpool questions regarding running pgpool as a load balancer with Sony as the replicator.
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> Is there anyway to load balance selects to more than 2 servers? ex. 1 master with 2 slaves? Run multiple instances?

It's on my TODO but will not be a trivial change.

> Is there any way to tell a select (ex. with a function) to go only the master and not the slave?

Pgpool will send any query not starting with "SELECT" or "select" to
the master. So you can insert a white space or a comment, for example
"/* NO LOAD BALANCE */" at the beginning of the line to prevent the
query to be sent to the slave.

> Is there any way to tell a select query to only go to the slave?

Set weight_secondary to 0.
--
Tatsuo Ishii

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