Added a note to the docs that pg_start_backup can take a long time to finish now that we spread out checkpoints:

*** doc/src/sgml/backup.sgml    1 Feb 2007 00:28:16 -0000       2.97
--- doc/src/sgml/backup.sgml    28 Jun 2007 11:44:20 -0000
***************
*** 672,678 ****
      <para>
It does not matter which database within the cluster you connect to to issue this command. You can ignore the result returned by the function;
!      but if it reports an error, deal with that before proceeding.
      </para>
     </listitem>
     <listitem>
--- 672,682 ----
      <para>
It does not matter which database within the cluster you connect to to issue this command. You can ignore the result returned by the function; ! but if it reports an error, deal with that before proceeding. Note that ! pg_start_backup can take a long time to finish. It performs a checkpoint, ! and if one is already running it has to wait for it to finish first. You ! can adjust <varname>checkpoint_completion_target</varname> to perform the
!      checkpoints more aggressively.
      </para>
     </listitem>
     <listitem>


--
  Heikki Linnakangas
  EnterpriseDB   http://www.enterprisedb.com

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