*** a/doc/src/sgml/config.sgml
--- b/doc/src/sgml/config.sgml
***************
*** 2252,2259 **** SELECT * FROM parent WHERE key = 2400;
          The planner will merge sub-queries into upper queries if the
          resulting <literal>FROM</literal> list would have no more than
          this many items.  Smaller values reduce planning time but might
!         yield inferior query plans.  The default is eight.  It is usually
!         wise to keep this less than <xref linkend="guc-geqo-threshold">.
          For more information see <xref linkend="explicit-joins">.
         </para>
        </listitem>
--- 2252,2261 ----
          The planner will merge sub-queries into upper queries if the
          resulting <literal>FROM</literal> list would have no more than
          this many items.  Smaller values reduce planning time but might
!         yield inferior query plans.  The default is eight.  Note that if this
!         value is less than <xref linkend="guc-geqo-threshold">, pulling up
!         subqueries may trigger GEQO planning, since it will increase the
!         number of <literal>FROM</literal> items.
          For more information see <xref linkend="explicit-joins">.
         </para>
        </listitem>