- The init or initdb mode creates a
- new
+ The init or initdb mode creates a new
PostgreSQL database cluster. A database
cluster is a collection of databases that are managed by a single
server instance. This mode invokes the initdb
In start mode, a new server is launched. The
- server is started in the background, and standard input is attached
+ server is started in the background, and its standard input is attached
to /dev/null (or nul on Windows).
On Unix-like systems, by default, the server's standard output and
- standard error are sen
d to
pg_ctl 's
+ standard error are sen
t to
pg_ctl 's
standard output (not standard error). The standard output of
pg_ctl should then be redirected to a
file or piped to another process such as a log rotating program
will write its output to the controlling terminal (from the
background) and will not leave the shell's process group. On
Windows, by default the server's standard output and standard error
- are sent to the terminal. These default behaviors can be changed
- by using -l to append server output to a log file.
+ are sent to the terminal. These default behaviors can be changed
+ by using -l to append the server's output to a log file.
+ Use of either -l or output redirection is recommended.
In stop mode, the server that is running in
the specified data directory is shut down. Three different
shutdown methods can be selected with the -m
- option: Smart
mode waits for online backup mod e
- to finish and all the clients to disconnect. This is the default .
- If the server is in recover y, recovery and streaming replication
+ option. Smart
mode (the default) waits for all activ e
+ clients to disconnect and any online backup to finish .
+ If the server is in hot standb y, recovery and streaming replication
will be terminated once all clients have disconnected.
Fast
mode does not wait for clients to disconnect and
will terminate an online backup in progress. All active transactions are
rolled back and clients are forcibly disconnected, then the
server is shut down. Immediate
mode will abort
- all server processes without a clean shutdown. This will lead to
- a recovery run on restart.
+ all server processes immediately, without a clean shutdown.
+ This will lead to a crash-recovery run on the next restart.
kill mode allows you to send a signal to a specified
process. This is particularly valuable for
Microsoft Windows - which does not have a
kill command. Use + which does not have a
kill command. Use --help to see a list of supported signal names.
register mode allows you to register a system service
on
Microsoft Windows. The -S option allows selection of service start type, either auto
(start
- service automatically on system startup), on demand
.
+ service automatically on system startup) or demand
(start
+ service on demand).
unregister mode allows you to unregister a system service
- on
Microsoft Windows, previously registered with the + on
Microsoft Windows. This undoes the effects of the register command.
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
+ where this is possible, by lifting any soft resource limit placed on
+ core files.
+ This is useful in debugging or diagnosing problems by allowing a
stack trace to be obtained from a failed server process.
Append the server log output to
filename . If the file does not
- exist, it is created. The umask is set to 077, so access to
- the log file from other users is disallowed by default.
+ exist, it is created. The umask is set to 077,
+ so access to the log file is disallowed to other users by default.
postgres command.
- The options are usually surrounded by single or double
+ The options should usually be surrounded by single or double
+ quotes to ensure that they are passed through as a group.
+
+
+
+
+
+ -o initdb-options
+
+ Specifies options to be passed directly to the
+ initdb command.
+
+ The options should usually be surrounded by single or double
quotes to ensure that they are passed through as a group.
-s
- Only print errors, no informational messages.
+ Print only errors, no informational messages.
-t
- The number of seconds to wait when waiting for start or shutdown
- to complete. The default is 60 seconds.
+ The maximum number of seconds to wait when waiting for startup or
+ shutdown to complete. The default is 60 seconds.
-w
- Wait for the start or shutdown to complete. The default wait time
- is 60 seconds but can be overridden with the option -t .
- To wait is the default option for shutdowns. A successful
- shutdown is indicated by removal of the
PID - file. For starting up, a successful psql -l
- indicates success. pg_ctl will attempt to
- use the proper port for
psql. If the environment variable - PGPORT exists, that is used. Otherwise, it will see if a port
- has been set in the postgresql.conf file.
- If neither of those is used, it will use the default port that
-
PostgreSQL was compiled with
- (5432 by default). When waiting, pg_ctl will
- return an accurate exit code based on the success of the startup
+ Wait for the startup or shutdown to complete.
+ Waiting is the default option for shutdowns, but not startups.
+ When waiting for shutdown, pg_ctl waits for
+ the server to remove its
PID file.
+ When waiting for startup, pg_ctl repeatedly
+ attempts to connect to the server via
psql, and + reports success when this is successful.
+ pg_ctl will attempt to use the proper port for
+
psql. If the environment variable + PGPORT exists, that is used. Otherwise,
+ pg_ctl will see if a port has been set in the
+ postgresql.conf file. If not, it will use the
+ default port that
PostgreSQL was compiled
+ with (5432 by default).
+ When waiting, pg_ctl will
+ return an exit code based on the success of the startup
or shutdown.
-W
- Do not wait for start or shutdown to complete. This is the
- default for starts and restart s.
+ Do not wait for startup or shutdown to complete. This is the
+ default for start and restart mode s.
- -P password
+ -U username
- Password for the user to start the service.
+ User name for the user to start the service. For domain users, use the
+ format DOMAIN\username .
- -U username
+ -P password
- User name for the user to start the service. For domain users, use the
- format DOMAIN\username .
+ Password for the user to start the service.
Default host name or Unix-domain socket location for
- linkend="app-psql"> (used by the -w option ).
+ linkend="app-psql"> (used when waiting for startup ).
- Default port number for (used by the -w option).
+ Default port number for
+ (used when waiting for startup).
- For additional server variables, see .
-
This utility, like most other PostgreSQL utilities,
+
pg_ctl , like most other
PostgreSQL + utilities,
also uses the environment variables supported by
libpq (see ).
+ For additional server variables, see .
If this file exists in the data directory,
-
pg_ctl (in
restart mode)
+
pg_ctl (in
restart mode)
will pass the contents of the file as options to
-
postgres , unless overridden
- by the -o option. The contents of this file
+
postgres , unless overridden
+ by the -o option. The contents of this file
are also displayed in status mode.
This file, located in the data directory, is parsed to find the
- proper port to use with
psql when the - -w is given in start mode
+ proper port to use with
psql + when waiting for startup .
Notes
- Waiting for complete start is not a well-defined operation and might
+ Waiting for complete startup 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 ,
- To restart server,
- waiting for it to shut down and to come up :
+ To restart the server,
+ waiting for it to shut down and come up again :
projects / postgresql.git / commitdiff