Add an index entry for "Performance Tips". Patch from Alvaro Herrera.

diff --git a/doc/src/sgml/perform.sgml b/doc/src/sgml/perform.sgml
index d49c57793b704c2f21d445618213fc0662b0d618..47792918ec6dad5b3d70537a6e5096bdd068ad25 100644 (file)
--- a/doc/src/sgml/perform.sgml
+++ b/doc/src/sgml/perform.sgml
@@ -1,10 +1,14 @@
 
 
  
   Performance Tips
 
+  
+   performance
+  
+
   
    Query performance can be affected by many things. Some of these can 
    be manipulated by the user, while others are fundamental to the underlying