Add a note to the documentation to clarify that even when

"autovacuum = off", the system may still periodically start autovacuum
processes to prevent XID wraparound. Patch from David Fetter, with
editorializing.

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 4d4200eb360c8862f2061fab2a025f6450adc353..4fd93f5a30c0fd4ab53addbf2335263da3313143 100644 (file)
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -1,4 +1,4 @@
-
+
 
 
   Server Configuration
@@ -3172,6 +3172,12 @@ SELECT * FROM parent WHERE key = 2400;
         This parameter can only be set in the postgresql.conf
         file or on the server command line.
        
+       
+        Note that even when this parameter is disabled, the system
+        will periodically launch autovacuum processes in order to
+        prevent transaction ID wraparound.  See 
+        linkend="vacuum-for-wraparound"> for more information.
+