Add note that autovacuum can use up several times maintenance_work_mem,

with warning against setting it too high.

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index f49ee28259c80e311f027fddbe17842ee86991fd..cf99ba2c85f505c0e845f3ea910b7a384020d8f9 100644 (file)
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -1,4 +1,4 @@
-
+
 
 
   Server Configuration
@@ -881,6 +881,11 @@ SET ENABLE_SEQSCAN TO OFF;
         than work_mem.  Larger settings might improve
         performance for vacuuming and for restoring database dumps.
        
+       
+        Note that when autovacuum runs, up to
+         times this memory may be
+        allocated, so be careful not to set the default value too high.
+