Remove outdated comment about relation level autovacuum freeze limits.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Remove the outdated sentence.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 faff45900c41d8de1d751f2da75d15f357e7a9c7..78bcbe25b1740a975bcd3a576d3e59a50237765e 100644 (file)
--- a/doc/src/sgml/ref/create_table.sgml
+++ b/doc/src/sgml/ref/create_table.sgml
@@ -973,9 +973,7 @@ CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXI
      Custom <xref linkend="guc-autovacuum-freeze-max-age"> parameter. Note that
      autovacuum will ignore attempts to set a per-table
      <literal>autovacuum_freeze_max_age</> larger than the system-wide setting
-     (it can only be set smaller). Note that while you can set
-     <literal>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).
      </para>
     </listitem>
    </varlistentry>