Remove outdated comment about relation level autovacuum freeze limits.

The documentation for the autovacuum_multixact_freeze_max_age and
autovacuum_freeze_max_age relation level parameters contained:
"Note that while you can set autovacuum_multixact_freeze_max_age very
small, or even zero, this is usually unwise since it will force frequent
vacuuming."
which hasn't been true since these options were made relation options,
instead of residing in the pg_autovacuum table (834a6da4f7).

Remove the outdated sentence. Even the lowered limits from 2596d70 are
high enough that this doesn't warrant calling out the risk in the CREATE
TABLE docs.

Per discussion with Tom Lane and Alvaro Herrera

Discussion: 26377.1443105453@sss.pgh.pa.us
Backpatch: 9.0- (in parts)

diff --git a/doc/src/sgml/ref/create_table.sgml b/doc/src/sgml/ref/create_table.sgml
index 38134ddc4e4f5a37eda63783d701527f9d124368..476ccce39323ba7cded36585889697ca311bde93 100644 (file)
--- a/doc/src/sgml/ref/create_table.sgml
+++ b/doc/src/sgml/ref/create_table.sgml
@@ -994,9 +994,7 @@ CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXI
      Custom  parameter. Note that
      autovacuum will ignore attempts to set a per-table
      autovacuum_freeze_max_age larger than the system-wide setting
-     (it can only be set smaller). Note that while you can set
-     autovacuum_freeze_max_age very small, or even zero, this is
-     usually unwise since it will force frequent vacuuming.
+     (it can only be set smaller).
      
     
    
@@ -1030,10 +1028,7 @@ CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXI
       Custom  parameter. Note
       that autovacuum will ignore attempts to set a per-table
       autovacuum_multixact_freeze_max_age larger than the
-      system-wide setting (it can only be set smaller).  Note that while you
-      can set autovacuum_multixact_freeze_max_age very small,
-      or even zero, this is usually unwise since it will force frequent
-      vacuuming.
+      system-wide setting (it can only be set smaller).