doc: Fix typos and other minor issues

Author: Alexander Lakhin <exclusion@gmail.com>

diff --git a/doc/src/sgml/perform.sgml b/doc/src/sgml/perform.sgml
index 1e7544afeb49e58e48fa696822a8730cd2b105e9..fb59ceaf95fc273458d8cf8de22e84c8f258e7b0 100644 (file)
--- a/doc/src/sgml/perform.sgml
+++ b/doc/src/sgml/perform.sgml
@@ -1534,7 +1534,7 @@ SELECT * FROM x, y, a, b, c WHERE something AND somethingelse;
      <listitem>
       <para>
        Increase <xref linkend="guc-checkpoint-segments"> and <xref
-       linkend="guc-checkpoint-timeout"> ; this reduces the frequency
+       linkend="guc-checkpoint-timeout">; this reduces the frequency
        of checkpoints, but increases the storage requirements of
        <filename>/pg_xlog</>.
       </para>