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postgresql8.3-docs-8.3.8-1mdv2010.0.i586.rpm

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><H1
><A
NAME="APP-PG-CTL"
></A
><SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN66591"
></A
><H2
>Name</H2
>pg_ctl&nbsp;--&nbsp;start, stop, or restart a <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> server</DIV
><A
NAME="AEN66595"
></A
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN66597"
></A
><H2
>Synopsis</H2
><P
><TT
CLASS="COMMAND"
>pg_ctl</TT
>  start  [-w] [-t <TT
CLASS="REPLACEABLE"
><I
>seconds</I
></TT
>] [-s] [-D <TT
CLASS="REPLACEABLE"
><I
>datadir</I
></TT
>] [-l <TT
CLASS="REPLACEABLE"
><I
>filename</I
></TT
>] [-o <TT
CLASS="REPLACEABLE"
><I
>options</I
></TT
>] [-p <TT
CLASS="REPLACEABLE"
><I
>path</I
></TT
>] [-c]<BR><TT
CLASS="COMMAND"
>pg_ctl</TT
>  stop  [-W] [-t <TT
CLASS="REPLACEABLE"
><I
>seconds</I
></TT
>] [-s] [-D <TT
CLASS="REPLACEABLE"
><I
>datadir</I
></TT
>] [-m
       s[mart] | f[ast] | i[mmediate] 
   ]<BR><TT
CLASS="COMMAND"
>pg_ctl</TT
>  restart  [-w] [-t <TT
CLASS="REPLACEABLE"
><I
>seconds</I
></TT
>] [-s] [-D <TT
CLASS="REPLACEABLE"
><I
>datadir</I
></TT
>] [-c] [-m
       s[mart] | f[ast] | i[mmediate] 
   ] [-o <TT
CLASS="REPLACEABLE"
><I
>options</I
></TT
>]<BR><TT
CLASS="COMMAND"
>pg_ctl</TT
>  reload  [-s] [-D <TT
CLASS="REPLACEABLE"
><I
>datadir</I
></TT
>]<BR><TT
CLASS="COMMAND"
>pg_ctl</TT
>  status  [-D <TT
CLASS="REPLACEABLE"
><I
>datadir</I
></TT
>]<BR><TT
CLASS="COMMAND"
>pg_ctl</TT
>  kill  [<TT
CLASS="REPLACEABLE"
><I
>signal_name</I
></TT
>] [<TT
CLASS="REPLACEABLE"
><I
>process_id</I
></TT
>]<BR><TT
CLASS="COMMAND"
>pg_ctl</TT
>  register  [-N <TT
CLASS="REPLACEABLE"
><I
>servicename</I
></TT
>] [-U <TT
CLASS="REPLACEABLE"
><I
>username</I
></TT
>] [-P <TT
CLASS="REPLACEABLE"
><I
>password</I
></TT
>] [-D <TT
CLASS="REPLACEABLE"
><I
>datadir</I
></TT
>] [-w] [-t <TT
CLASS="REPLACEABLE"
><I
>seconds</I
></TT
>] [-o <TT
CLASS="REPLACEABLE"
><I
>options</I
></TT
>]<BR><TT
CLASS="COMMAND"
>pg_ctl</TT
>  unregister  [-N <TT
CLASS="REPLACEABLE"
><I
>servicename</I
></TT
>]</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="APP-PG-CTL-DESCRIPTION"
></A
><H2
>Description</H2
><P
>   <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
> is a utility for starting,
   stopping, or restarting the <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>
   backend server (<A
HREF="app-postgres.html"
><SPAN
CLASS="APPLICATION"
>postgres</SPAN
></A
>), or displaying the
   status of a running server.  Although the server can be started
   manually, <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
> encapsulates tasks such
   as redirecting log output and properly detaching from the terminal
   and process group. It also provides convenient options for
   controlled shutdown.
  </P
><P
>   In <TT
CLASS="OPTION"
>start</TT
> mode, a new server is launched.  The
   server is started in the background, and standard input is attached to
   <TT
CLASS="FILENAME"
>/dev/null</TT
>.  The standard output and standard
   error are either appended to a log file (if the <TT
CLASS="OPTION"
>-l</TT
>
   option is used), or redirected to <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
>'s 
   standard output (not standard error).  If no log file is chosen, the 
   standard output of <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
> should be redirected 
   to a file or piped to another process such as a log rotating program
   like <SPAN
CLASS="APPLICATION"
>rotatelogs</SPAN
>; otherwise <TT
CLASS="COMMAND"
>postgres</TT
> 
   will write its output to the controlling terminal (from the background) 
   and will not leave the shell's process group.
  </P
><P
>   In <TT
CLASS="OPTION"
>stop</TT
> mode, the server that is running in
   the specified data directory is shut down.  Three different
   shutdown methods can be selected with the <TT
CLASS="OPTION"
>-m</TT
>
   option: <SPAN
CLASS="QUOTE"
>"Smart"</SPAN
> mode waits for all the clients to
   disconnect.  This is the default.  <SPAN
CLASS="QUOTE"
>"Fast"</SPAN
> mode does
   not wait for clients to disconnect.  All active transactions are
   rolled back and clients are forcibly disconnected, then the
   server is shut down.  <SPAN
CLASS="QUOTE"
>"Immediate"</SPAN
> mode will abort
   all server processes without a clean shutdown.  This will lead to 
   a recovery run on restart.
  </P
><P
>   <TT
CLASS="OPTION"
>restart</TT
> mode effectively executes a stop followed
   by a start.  This allows changing the <TT
CLASS="COMMAND"
>postgres</TT
>
   command-line options.
  </P
><P
>   <TT
CLASS="OPTION"
>reload</TT
> mode simply sends the
   <TT
CLASS="COMMAND"
>postgres</TT
> process a <SPAN
CLASS="SYSTEMITEM"
>SIGHUP</SPAN
>
   signal, causing it to reread its configuration files
   (<TT
CLASS="FILENAME"
>postgresql.conf</TT
>,
   <TT
CLASS="FILENAME"
>pg_hba.conf</TT
>, etc.).  This allows changing of
   configuration-file options that do not require a complete restart
   to take effect.
  </P
><P
>   <TT
CLASS="OPTION"
>status</TT
> mode checks whether a server is running in
   the specified data directory. If it is, the <ACRONYM
CLASS="ACRONYM"
>PID</ACRONYM
>
   and the command line options that were used to invoke it are
   displayed.
  </P
><P
>   <TT
CLASS="OPTION"
>kill</TT
> mode allows you to send a signal to a specified
    process.  This is particularly valuable for <SPAN
CLASS="PRODUCTNAME"
>Microsoft Windows</SPAN
>
    which does not have a <SPAN
CLASS="APPLICATION"
>kill</SPAN
> command.  Use 
    <TT
CLASS="LITERAL"
>--help</TT
> to see a list of supported signal names.
  </P
><P
>   <TT
CLASS="OPTION"
>register</TT
> mode allows you to register a system service
   on <SPAN
CLASS="PRODUCTNAME"
>Microsoft Windows</SPAN
>.
  </P
><P
>   <TT
CLASS="OPTION"
>unregister</TT
> mode allows you to unregister a system service
   on <SPAN
CLASS="PRODUCTNAME"
>Microsoft Windows</SPAN
>, previously registered with the
   <TT
CLASS="OPTION"
>register</TT
> command.
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="APP-PG-CTL-OPTIONS"
></A
><H2
>Options</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="OPTION"
>-c</TT
></DT
><DD
><P
>        Attempt to allow server crashes to produce core files, on platforms
        where this available, by lifting any soft resource limit placed on 
        them. 
        This is useful in debugging or diagnosing problems by allowing a 
        stack trace to be obtained from a failed server process.
       </P
></DD
><DT
><TT
CLASS="OPTION"
>-D <TT
CLASS="REPLACEABLE"
><I
>datadir</I
></TT
></TT
></DT
><DD
><P
>        Specifies the file system location of the database files.  If
        this is omitted, the environment variable
        <TT
CLASS="ENVAR"
>PGDATA</TT
> is used.
       </P
></DD
><DT
><TT
CLASS="OPTION"
>-l <TT
CLASS="REPLACEABLE"
><I
>filename</I
></TT
></TT
></DT
><DD
><P
>        Append the server log output to
        <TT
CLASS="REPLACEABLE"
><I
>filename</I
></TT
>.  If the file does not
        exist, it is created.  The <SPAN
CLASS="SYSTEMITEM"
>umask</SPAN
> is set to 077, so access to
        the log file from other users is disallowed by default.
       </P
></DD
><DT
><TT
CLASS="OPTION"
>-m <TT
CLASS="REPLACEABLE"
><I
>mode</I
></TT
></TT
></DT
><DD
><P
>        Specifies the shutdown mode.  <TT
CLASS="REPLACEABLE"
><I
>mode</I
></TT
>
        can be <TT
CLASS="LITERAL"
>smart</TT
>, <TT
CLASS="LITERAL"
>fast</TT
>, or
        <TT
CLASS="LITERAL"
>immediate</TT
>, or the first letter of one of
        these three.
       </P
></DD
><DT
><TT
CLASS="OPTION"
>-o <TT
CLASS="REPLACEABLE"
><I
>options</I
></TT
></TT
></DT
><DD
><P
>        Specifies options to be passed directly to the
        <TT
CLASS="COMMAND"
>postgres</TT
> command.
       </P
><P
>        The options are usually surrounded by single or double
        quotes to ensure that they are passed through as a group.
       </P
></DD
><DT
><TT
CLASS="OPTION"
>-p <TT
CLASS="REPLACEABLE"
><I
>path</I
></TT
></TT
></DT
><DD
><P
>        Specifies the location of the <TT
CLASS="FILENAME"
>postgres</TT
>
        executable.  By default the <TT
CLASS="FILENAME"
>postgres</TT
> executable is taken from the same
        directory as <TT
CLASS="COMMAND"
>pg_ctl</TT
>, or failing that, the hard-wired
        installation directory.  It is not necessary to use this
        option unless you are doing something unusual and get errors
        that the <TT
CLASS="FILENAME"
>postgres</TT
> executable was not found.
       </P
></DD
><DT
><TT
CLASS="OPTION"
>-s</TT
></DT
><DD
><P
>        Only print errors, no informational messages.
       </P
></DD
><DT
><TT
CLASS="OPTION"
>-t</TT
></DT
><DD
><P
>        The number of seconds to wait when waiting for start or shutdown
        to complete.
       </P
></DD
><DT
><TT
CLASS="OPTION"
>-w</TT
></DT
><DD
><P
>        Wait for the start or shutdown to complete.  The default wait time
        is 60 seconds.  This is the default option for shutdowns. A successful 
        shutdown is indicated by removal of the <ACRONYM
CLASS="ACRONYM"
>PID</ACRONYM
> 
        file. For starting up, a successful <TT
CLASS="COMMAND"
>psql -l</TT
> 
        indicates success. <TT
CLASS="COMMAND"
>pg_ctl</TT
> will attempt to 
        use the proper port for <SPAN
CLASS="APPLICATION"
>psql</SPAN
>. If the environment variable 
        <TT
CLASS="ENVAR"
>PGPORT</TT
> exists, that is used. Otherwise, it will see if a port 
        has been set in the <TT
CLASS="FILENAME"
>postgresql.conf</TT
> file. 
        If neither of those is used, it will use the default port that 
        <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> was compiled with 
        (5432 by default). When waiting, <TT
CLASS="COMMAND"
>pg_ctl</TT
> will
        return an accurate exit code based on the success of the startup 
        or shutdown.
       </P
></DD
><DT
><TT
CLASS="OPTION"
>-W</TT
></DT
><DD
><P
>        Do not wait for start or shutdown to complete.  This is the
        default for starts and restarts.
       </P
></DD
></DL
></DIV
><DIV
CLASS="REFSECT2"
><A
NAME="APP-PG-CTL-WINDOWS-OPTIONS"
></A
><H3
>Options for Windows</H3
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="OPTION"
>-N <TT
CLASS="REPLACEABLE"
><I
>servicename</I
></TT
></TT
></DT
><DD
><P
>       Name of the system service to register. The name will be used
       as both the service name and the display name.
      </P
></DD
><DT
><TT
CLASS="OPTION"
>-P <TT
CLASS="REPLACEABLE"
><I
>password</I
></TT
></TT
></DT
><DD
><P
>       Password for the user to start the service.
      </P
></DD
><DT
><TT
CLASS="OPTION"
>-U <TT
CLASS="REPLACEABLE"
><I
>username</I
></TT
></TT
></DT
><DD
><P
>       User name for the user to start the service. For domain users, use the
       format <TT
CLASS="LITERAL"
>DOMAIN\username</TT
>.
      </P
></DD
></DL
></DIV
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN66830"
></A
><H2
>Environment</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="ENVAR"
>PGDATA</TT
></DT
><DD
><P
>      Default data directory location.
     </P
></DD
><DT
><TT
CLASS="ENVAR"
>PGPORT</TT
></DT
><DD
><P
>      Default port for <A
HREF="app-psql.html"
><SPAN
CLASS="APPLICATION"
>psql</SPAN
></A
> (used by the -w option).
     </P
></DD
></DL
></DIV
><P
>   For additional server variables, see <A
HREF="app-postgres.html"
><SPAN
CLASS="APPLICATION"
>postgres</SPAN
></A
>.
   This utility, like most other <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> utilities,
   also uses the environment variables supported by <SPAN
CLASS="APPLICATION"
>libpq</SPAN
>
   (see <A
HREF="libpq-envars.html"
>Section 30.12</A
>).
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN66849"
></A
><H2
>Files</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="FILENAME"
>postmaster.pid</TT
></DT
><DD
><P
>      The existence of this file in the data directory is used to help
      <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
> determine if the server is
      currently running or not.
     </P
></DD
><DT
><TT
CLASS="FILENAME"
>postmaster.opts.default</TT
></DT
><DD
><P
>      If this file exists in the data directory,
      <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
> (in <TT
CLASS="OPTION"
>start</TT
>
      mode) will pass the contents of the file as options to the
      <TT
CLASS="COMMAND"
>postgres</TT
> command, unless overridden by the
      <TT
CLASS="OPTION"
>-o</TT
> option.
     </P
></DD
><DT
><TT
CLASS="FILENAME"
>postmaster.opts</TT
></DT
><DD
><P
>If this file exists in the data directory,
      <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
> (in <TT
CLASS="OPTION"
>restart</TT
> mode) 
      will pass the contents of the file as options to
      <SPAN
CLASS="APPLICATION"
>postgres</SPAN
>, unless overridden 
      by the <TT
CLASS="OPTION"
>-o</TT
> option. The contents of this file 
      are also displayed in <TT
CLASS="OPTION"
>status</TT
> mode.
     </P
></DD
><DT
><TT
CLASS="FILENAME"
>postgresql.conf</TT
></DT
><DD
><P
>      This file, located in the data directory, is parsed to find the
      proper port to use with <SPAN
CLASS="APPLICATION"
>psql</SPAN
> when the
      <TT
CLASS="OPTION"
>-w</TT
> is given in <TT
CLASS="OPTION"
>start</TT
> mode.
     </P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN66885"
></A
><H2
>Notes</H2
><P
>   Waiting for complete start is not a well-defined operation and might
   fail if access control is set up so that a local client cannot
   connect without manual interaction (e.g., password authentication).  For
   additional connection variables, see <A
HREF="libpq-envars.html"
>Section 30.12</A
>,
   and for passwords, also see <A
HREF="libpq-pgpass.html"
>Section 30.13</A
>.
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="R1-APP-PGCTL-2"
></A
><H2
>Examples</H2
><DIV
CLASS="REFSECT2"
><A
NAME="R2-APP-PGCTL-3"
></A
><H3
>Starting the Server</H3
><P
>    To start up a server:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$</SAMP
> <KBD
CLASS="USERINPUT"
>pg_ctl start</KBD
></PRE
><P>
   </P
><P
>    An example of starting the server, blocking until the server has
    come up is:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$</SAMP
> <KBD
CLASS="USERINPUT"
>pg_ctl -w start</KBD
></PRE
><P>
   </P
><P
>    For a server using port 5433, and
    running without <CODE
CLASS="FUNCTION"
>fsync</CODE
>, use:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$</SAMP
> <KBD
CLASS="USERINPUT"
>pg_ctl -o "-F -p 5433" start</KBD
></PRE
><P>
   </P
></DIV
><DIV
CLASS="REFSECT2"
><A
NAME="R2-APP-PGCTL-4"
></A
><H3
>Stopping the Server</H3
><P
></P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$</SAMP
> <KBD
CLASS="USERINPUT"
>pg_ctl stop</KBD
></PRE
><P>
    stops the server. Using the <TT
CLASS="OPTION"
>-m</TT
> switch allows one
    to control <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>how</I
></SPAN
> the backend shuts down.
   </P
></DIV
><DIV
CLASS="REFSECT2"
><A
NAME="R2-APP-PGCTL-5"
></A
><H3
>Restarting the Server</H3
><P
>    Restarting the server is almost equivalent to stopping the
    server and starting it again
    except that <TT
CLASS="COMMAND"
>pg_ctl</TT
> saves and reuses the command line options that
    were passed to the previously running instance.  To restart
    the server in the simplest form, use:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$</SAMP
> <KBD
CLASS="USERINPUT"
>pg_ctl restart</KBD
></PRE
><P>
   </P
><P
>    To restart server,
    waiting for it to shut down and to come up:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$</SAMP
> <KBD
CLASS="USERINPUT"
>pg_ctl -w restart</KBD
></PRE
><P>
   </P
><P
>    To restart using port 5433 and disabling <CODE
CLASS="FUNCTION"
>fsync</CODE
> after restarting:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$</SAMP
> <KBD
CLASS="USERINPUT"
>pg_ctl -o "-F -p 5433" restart</KBD
></PRE
><P>
   </P
></DIV
><DIV
CLASS="REFSECT2"
><A
NAME="R2-APP-PGCTL-6"
></A
><H3
>Showing the Server Status</H3
><P
>    Here is a sample status output from
    <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
>:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$</SAMP
> <KBD
CLASS="USERINPUT"
>pg_ctl status</KBD
>
<SAMP
CLASS="COMPUTEROUTPUT"
>pg_ctl: server is running (pid: 13718)
Command line was:
/usr/local/pgsql/bin/postgres '-D' '/usr/local/pgsql/data' '-p' '5433' '-B' '128'</SAMP
></PRE
><P>
    This is the command line that would be invoked in restart mode.
   </P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN66939"
></A
><H2
>See Also</H2
><P
>   <A
HREF="app-postgres.html"
><SPAN
CLASS="APPLICATION"
>postgres</SPAN
></A
>
  </P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
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><TD
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