Remove outdated comment about relation level autovacuum freeze limits.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Remove the outdated sentence.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 a1192d39011228d0e7207cca44421a0460726fb8..e53a8d02428ba69452e69a4d91b7adbfd655c3c6 100644 (file)
--- a/doc/src/sgml/ref/create_table.sgml
+++ b/doc/src/sgml/ref/create_table.sgml
@@ -936,9 +936,7 @@ CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } ] TABLE <replaceable class="PAR
      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>