Log Message:
-----------
Document that enabling asserts can _significantly_ slow down the server.
Back patch to 8.3.X.
Modified Files:
--------------
pgsql/doc/src/sgml:
installation.sgml (r1.302 -> r1.303)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/installation.sgml?r1=1.302&r2=1.303)