--- /dev/null
+
+
+
+
+
+
+ Application
+
+
+
+
+
+
+ Starts, stops, and restarts postmaster
+
+
+
+
+
+ 2000-04-05
+
+
+
+pg_ctl [-w] [-D datadir][-p path] [-o "options"] start
+pg_ctl [-w] [-D datadir] [-m [s[mart]|f[ast]|i[mmediate]]] stop
+pg_ctl [-w] [-D datadir] [-m [s[mart]|f[ast]|i[mmediate]] [-o "options"] restart
+pg_ctl [-D datadir] status
+
+
+
+
+ Inputs
+
+
+
+
+ -w
+
+ Wait for the database server comes up, by
+ watching for creation of the pid file (PGDATA/postmaster.pid).
+ Times out after 60 seconds.
+
+
+
+
+
+ -D datadir
+
+ Specifies the database location for this database installation.
+
+
+
+
+
+ -p path
+
+ Specifies the path to the postmaster image.
+
+
+
+
+
+ -o "options"
+
+ Specifies options to be passed directly to
+
+ The parameters are usually surrounded by single- or double
+ quotes to ensure that they are passed through as a group.
+
+
+
+
+
+ -m mode
+
+ Specifies the shutdown mode.
+
+
+
+ smart
+ s
+
+ smart mode waits for all
+ the clients to logout. This is the default.
+
+
+
+
+
+ f[ast]
+ f
+
+ Fast mode sends SIGTERM to the backends, that means
+ active transactions get rolled back.
+
+
+
+
+
+ immediate
+ i
+
+ Immediate mode sends SIGUSR1
+ to the backends and lets them abort. In this case, database recovery
+ will be neccessary on the next startup.
+
+
+
+
+
+
+
+
+
+ start
+
+
+
+
+
+
+ stop
+
+
+
+
+
+
+ restart
+
+ Restart the
postmaster, performing
+ a stop/start sequence.
+
+
+
+
+
+ status
+
+ Show the current state of
postmaster.
+
+
+
+
+
+
+
+
+
+ 1999-11-07
+
+
+ Outputs
+
+
+
+ pg_ctl: postmaster is state (pid: #)
+
+ Postmaster status.
+
+
+
+
+
+ If there is an error condition, the backend error message will be displayed.
+
+
+
+
+
+
+ Description
+
+
pg_ctl is a utility for starting,
+ stopping or restarting
postmaster.
+
+
+
+
+
+ Usage
+
+
+
+
+ Starting postmaster
+
+
+ To start up
postmaster:
+
+> pg_ctl start
+
+
+
+ If -w is supplied, pg_ctl waits for the database server comes up, by
+ watching for creation of the pid file (PGDATA/postmaster.pid), for up
+ to 60 seconds.
+
+
+ Parameters to invoke
postmaster are
+ taken from the following sources:
+
+
+
+ Path to postmaster: found in the command search path.
+
+
+
+
+ Database directory: PGDATA environment variable.
+
+
+
+
+ Other parameters:
+ PGDATA/postmaster.opts.default.
+
+
+
+
+
+ postmaster.opts.default contains parameters
+ default installation, the option is enabled.
+ So pg_ctl start implies:
+
+postmaster -S
+
+
+
+ Note that postmaster.opts.default is
+ installed by
initdb from
+ lib/postmaster.opts.default.sample
+ under the
Postgres installation
+ directory (lib/postmaster.opts.default.sample
+ is copied from
+ src/bin/pg_ctl/postmaster.opts.default.sample
+ while installing
Postgres).
+
+
+ To override the default parameters you can use ,
+ and options.
+
+
+ An example of starting the
+
postmaster, blocking until
+ postmaster comes up is:
+> pg_ctl -w start
+
+
+
+ To specify the
postmaster binary path,
+ try:
+
+> pg_ctl -p /usr/local/pgsq/bin/postmaster start
+
+
+
+ For a
postmaster using port 5433, and
+ running without fsync, use:
+
+> pg_ctl -o "-o -F -p 5433" start
+
+
+
+
+
+
+ Stopping postmaster
+
+
+> pg_ctl stop
+
+
+ stops postmaster. Using the switch allows one
+ to control how the backend shuts down.
+
+ waits for postmaster to shut down.
+ specifies the shut down mode.
+
+
+
+
+
+ Restarting postmaster
+
+
+ This is almost equivalent to stopping the
+
postmaster then starting it
+ again except that the parameters used before stopping
+ it would be used too. This is done by saving them in
+ $PGDATA/postmaster.opts file.
+ , , ,
+ , and
+
+ can also be used in the restarting mode and they have same meanings as
+ described above.
+
+
+ To restart
postmaster in the simplest
+ form:
+
+> pg_ctl restart
+
+
+
+ waiting for it to shut down and to come up:
+
+> pg_ctl -w restart
+
+
+
+ To restart using port 5433 and disabling fsync after restarting:
+
+> pg_ctl -o "-o -F -p 5433" restart
+
+
+
+
+
+
+ postmaster status
+
+
+ To get status information from postmaster:
+
+> pg_ctl status
+
+
+
+ Here is a sample output from
pg_ctl:
+
+pg_ctl: postmaster is running (pid: 13718)
+options are:
+/usr/local/src/pgsql/current/bin/postmaster
+-p 5433
+-D /usr/local/src/pgsql/current/data
+-B 64
+-b /usr/local/src/pgsql/current/bin/postgres
+-N 32
+-o '-F'
+
+
+
+
+
+
+