Unable to reload postgresql.conf without restarting

From: Jose Martinez <jmartinez(at)opencrowd(dot)com>
To: pgsql-general(at)postgresql(dot)org, pgsql-admin(at)postgresql(dot)org
Subject: Unable to reload postgresql.conf without restarting
Date: 2013-01-03 16:25:41
Message-ID: CA+ixmX1xh8F5-zcrk0a9DaFfXwgujKm+MVcJab-tXMzoVzFXGQ@mail.gmail.com
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Hi,

I made some changes to postgresql.conf and I want them to take effect
without having to restart the server.

I tried

select pg_reload_conf();
/usr/pgsql-9.1/bin/pg_ctl reload

but when I do 'show all', I see no changes take effect.

There settings I tried to change are:
-effective_cache_size
-work_mem

Im using posgres 9.1 on Centos Linux (amazon ec2)

Thanks

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