Log Message:
-----------
Update performance discussion for 8.1. Add a little more explanatory
material in the EXPLAIN section, update examples to match current reality,
show examples of bitmap indexscans as well as plain ones.
Modified Files:
--------------
pgsql/doc/src/sgml:
perform.sgml (r1.51 -> r1.52)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/perform.sgml.diff?r1=1.51&r2=1.52)
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