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How can I modify the configuration for a postgres-8 resource managed by a RHEL High Availability cluster with rgmanager?

Solution Verified - Updated 2014-10-24T19:37:00+00:00 -

Issue

Is there a way to modify the configuration of a cluster-managed postgres instance and apply it without restarting the service?
Need to change configuration file: postgresql.conf for database in Red Hat HA cluster, but Red Hat HA is using a copy of the original file in different location at /etc/cluster/postgres-8/, which prevents me from updating the configuration and being able to reload it with pg_ctl reload.

Environment

Red Hat Enterprise Linux (RHEL) 5 or 6 with the High Availability Add On
rgmanager
One or more postgres-8 resources in /etc/cluster/cluster.conf

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