Log Message:
-----------
Add suggestion about how to set checkpoint_warning to log all
checkpoints.
Modified Files:
--------------
pgsql/doc/src/sgml:
config.sgml (r1.164 -> r1.165)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/config.sgml?r1=1.164&r2=1.165)