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Marginal improvement of description of recovery_end_command.

This commit is contained in:
Tom Lane 2009-06-26 22:06:11 +00:00
parent 2de48a83e6
commit df858fe58a
1 changed files with 14 additions and 9 deletions
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23
doc/src/sgml/backup.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/backup.sgml,v 2.128 2009/06/05 13:40:31 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/backup.sgml,v 2.129 2009/06/26 22:06:11 tgl Exp $ -->
<chapter id="backup">
<title>Backup and Restore</title>
@ -1108,8 +1108,9 @@ restore_command = 'cp /mnt/server/archivedir/%f %p'
last valid restart point. That is the earliest file that must be kept
to allow a restore to be restartable, so this information can be used
to truncate the archive to just the minimum required to support
restart of the current restore. <literal>%r</> would only be used in a
warm-standby configuration (see <xref linkend="warm-standby">).
restart from the current restore. <literal>%r</> would typically be
used in a warm-standby configuration
(see <xref linkend="warm-standby">).
Write <literal>%%</> to embed an actual <literal>%</> character
in the command.
</para>
@ -1132,19 +1133,23 @@ restore_command = 'copy "C:\\server\\archivedir\\%f" "%p"' # Windows
<para>
This parameter specifies a shell command that will be executed once only
at the end of recovery. This parameter is optional. The purpose of the
recovery_end_command is to provide a mechanism for cleanup following
replication or recovery.
<varname>recovery_end_command</> is to provide a mechanism for cleanup
following replication or recovery.
Any <literal>%r</> is replaced by the name of the file
containing the last valid restart point. That is the earliest file that
must be kept to allow a restore to be restartable, so this information
can be used to truncate the archive to just the minimum required to
support restart of the current restore. <literal>%r</> would only be
used in a warm-standby configuration (see <xref linkend="warm-standby">).
support restart from the current restore. <literal>%r</> would
typically be used in a warm-standby configuration
(see <xref linkend="warm-standby">).
Write <literal>%%</> to embed an actual <literal>%</> character
in the command.
</para>
<para>
If the command returns a non-zero exit status then a WARNING log
message will be written, unless signalled in which case we return
a FATAL error.
message will be written and the database will proceed to start up
anyway. An exception is that if the command was terminated by a
signal, the database will not proceed with startup.
</para>
</listitem>
</varlistentry>