Log Message:
-----------
Add an index entry for "Performance Tips". Patch from Alvaro Herrera.
Modified Files:
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pgsql-server/doc/src/sgml:
perform.sgml (r1.45 -> r1.46)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/doc/src/sgml/perform.sgml.diff?r1=1.45&r2=1.46)