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pg_ctl stop
$ pg_ctl --help
Usage:
pg_ctl stop [-W] [-t SECS] [-D DATADIR] [-s] [-m SHUTDOWN-MODE]
Common options:
-D, --pgdata=DATADIR location of the database storage area
-s, --silent only print errors, no informational messages
-t, --timeout=SECS seconds to wait when using -w option
-V, --version output version information, then exit
-w wait until operation completes
-W do not wait until operation completes
Options for stop or restart:
-m, --mode=MODE MODE can be "smart", "fast", or "immediate"
Shutdown modes are:
smart quit after all clients have disconnected
fast quit directly, with proper shutdown
immediate quit without complete shutdown; will lead to recovery on restart
Allowed signal names for kill:
ABRT HUP INT QUIT TERM USR1 USR2
只列出了些和 stop 相关的
pg_ctl stop -m smart
-m选项可以选择三种不同的关闭方法
pg_ctl stop -m smart
SIGTERM "Smart"模式等待所有客户端断开连接以及任何在线备份结束。如果该服务器是热备，一旦所有的客户端已经断开连接，恢复和流复制将被终止。
pg_ctl stop -m fast
pg_ctl stop -m fast
SIGINT "Fast"模式（默认）不会等待客户端断开连接并且将终止进行中的在线备份。所有活动事务都被回滚并且客户端被强制断开连接，然后服务器被关闭。
pg_ctl stop -m immediate
pg_ctl stop -m immediate
SIGQUIT "Immediate"模式将立刻中止所有服务器进程，而不是做一次干净的关闭。这将导致下一次重启时进行一次崩溃恢复。