Unrecognized configuration parameter "custom_variable_classes"

Question

I get this message after updating the system:

unrecognized configuration parameter "custom_variable_classes" in file "/var/lib/pgsql/data/postgresql.conf" line 501 

Are additional classes of variables supported?

Answer 1

Starting with version 9.2, this instruction is no longer needed:

http://www.postgresql.org/docs/current/interactive/release-9-2.html#AEN111020

Just delete or uncomment the line:

 #custom_variable_classes = 'foo' # list of custom variable class names foo.bar=0