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><H1
><A
NAME="PGARCHIVECLEANUP"
></A
><SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN153820"
></A
><H2
>Name</H2
>pg_archivecleanup -- clean up <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> WAL archive files</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN153826"
></A
><H2
>Synopsis</H2
><P
><TT
CLASS="COMMAND"
>pg_archivecleanup</TT
> [<TT
CLASS="REPLACEABLE"
><I
>option</I
></TT
>...] <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
> <TT
CLASS="REPLACEABLE"
><I
>oldestkeptwalfile</I
></TT
> </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN153835"
></A
><H2
>Description</H2
><P
> <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> is designed to be used as an
<TT
CLASS="LITERAL"
>archive_cleanup_command</TT
> to clean up WAL file archives when
running as a standby server (see <A
HREF="warm-standby.html"
>Section 25.2</A
>).
<SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> can also be used as a standalone program to
clean WAL file archives.
</P
><P
> To configure a standby
server to use <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
>, put this into its
<TT
CLASS="FILENAME"
>recovery.conf</TT
> configuration file:
</P><PRE
CLASS="PROGRAMLISTING"
>archive_cleanup_command = 'pg_archivecleanup <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
> %r'</PRE
><P>
where <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
> is the directory from which WAL segment
files should be removed.
</P
><P
> When used within <A
HREF="archive-recovery-settings.html#ARCHIVE-CLEANUP-COMMAND"
>archive_cleanup_command</A
>, all WAL files
logically preceding the value of the <TT
CLASS="LITERAL"
>%r</TT
> argument will be removed
from <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
>. This minimizes the number of files
that need to be retained, while preserving crash-restart capability. Use of
this parameter is appropriate if the <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
> is a
transient staging area for this particular standby server, but
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>not</I
></SPAN
> when the <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
> is intended as a
long-term WAL archive area, or when multiple standby servers are recovering
from the same archive location.
</P
><P
> When used as a standalone program all WAL files logically preceding the
<TT
CLASS="REPLACEABLE"
><I
>oldestkeptwalfile</I
></TT
> will be removed from <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
>.
In this mode, if you specify a <TT
CLASS="FILENAME"
>.backup</TT
> file name, then only the file prefix
will be used as the <TT
CLASS="REPLACEABLE"
><I
>oldestkeptwalfile</I
></TT
>. This allows you to remove
all WAL files archived prior to a specific base backup without error.
For example, the following example will remove all files older than
WAL file name <TT
CLASS="FILENAME"
>000000010000003700000010</TT
>:
</P><PRE
CLASS="PROGRAMLISTING"
>pg_archivecleanup -d archive 000000010000003700000010.00000020.backup
pg_archivecleanup: keep WAL file "archive/000000010000003700000010" and later
pg_archivecleanup: removing file "archive/00000001000000370000000F"
pg_archivecleanup: removing file "archive/00000001000000370000000E"</PRE
><P>
</P
><P
> <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> assumes that
<TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
> is a directory readable and writable by the
server-owning user.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN153865"
></A
><H2
>Options</H2
><P
> <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> accepts the following command-line arguments:
<P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="OPTION"
>-d</TT
></DT
><DD
><P
> Print lots of debug logging output on <TT
CLASS="FILENAME"
>stderr</TT
>.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-n</TT
></DT
><DD
><P
> Print the names of the files that would have been removed on <TT
CLASS="FILENAME"
>stdout</TT
> (performs a dry run).
</P
></DD
><DT
><TT
CLASS="OPTION"
>-V</TT
><BR><TT
CLASS="OPTION"
>--version</TT
></DT
><DD
><P
> Print the <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> version and exit.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-x</TT
> <TT
CLASS="REPLACEABLE"
><I
>extension</I
></TT
></DT
><DD
><P
> When using the program as a standalone utility, provide an extension
that will be stripped from all file names before deciding if they
should be deleted. This is typically useful for cleaning up archives
that have been compressed during storage, and therefore have had an
extension added by the compression program. For example: <TT
CLASS="LITERAL"
>-x
.gz</TT
>.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-?</TT
><BR><TT
CLASS="OPTION"
>--help</TT
></DT
><DD
><P
> Show help about <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> command line
arguments, and exit.
</P
></DD
></DL
></DIV
><P>
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN153905"
></A
><H2
>Notes</H2
><P
> <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> is designed to work with
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> 8.0 and later when used as a standalone utility,
or with <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> 9.0 and later when used as an
archive cleanup command.
</P
><P
> <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> is written in C and has an
easy-to-modify source code, with specifically designated sections to modify
for your own needs
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN153913"
></A
><H2
>Examples</H2
><P
>On Linux or Unix systems, you might use:
</P><PRE
CLASS="PROGRAMLISTING"
>archive_cleanup_command = 'pg_archivecleanup -d /mnt/standby/archive %r 2>>cleanup.log'</PRE
><P>
where the archive directory is physically located on the standby server,
so that the <TT
CLASS="VARNAME"
>archive_command</TT
> is accessing it across NFS,
but the files are local to the standby.
This will:
</P
><P
></P
><UL
><LI
><P
> produce debugging output in <TT
CLASS="FILENAME"
>cleanup.log</TT
>
</P
></LI
><LI
><P
> remove no-longer-needed files from the archive directory
</P
></LI
></UL
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN153924"
></A
><H2
>Author</H2
><P
> Simon Riggs <CODE
CLASS="EMAIL"
><<A
HREF="mailto:simon@2ndquadrant.com"
>simon@2ndquadrant.com</A
>></CODE
>
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN153928"
></A
><H2
>See Also</H2
><A
HREF="pgstandby.html"
><SPAN
CLASS="APPLICATION"
>pg_standby</SPAN
></A
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