kill -9 pid pid pid pid 

kill -9 干掉进程，哈哈~。。。。。。。。。。。。。

kill -9 好粗暴的感觉。哈。

一、启动数据库

pg_ctl start -D $PGDATA或pg_ctl start -D /kingdee/pgsql

$PGDATA执行postgresql的数据库的数据目录

二、停止数据库

pg_ctl stop -D $PGDATA [-m shutdown-mode]

-m shutdown-mode指数据库停止的方法，有以下三种：

smart: 等所有的连接终止后关闭数据库。如果客户端连接不终止，则无法关闭数据库。

fast: 相当于oracle数据库的immdiate模式

immediate：相当于oracle数据库的abort模式

[pgsql@easha1 ~]$ pg_ctl start -D $PGDATA waiting for server to start....2022-01-05 11:01:16.931 CST [7425] LOG: starting PostgreSQL 14.1 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36), 64-bit 2022-01-05 11:01:16.932 CST [7425] LOG: listening on IPv6 address "::1", port 5432 2022-01-05 11:01:16.932 CST [7425] LOG: listening on IPv4 address "127.0.0.1", port 5432 2022-01-05 11:01:16.933 CST [7425] LOG: listening on Unix socket "/tmp/.s.PGSQL.5432" 2022-01-05 11:01:16.935 CST [7426] LOG: database system was shut down at 2022-01-05 10:28:59 CST 2022-01-05 11:01:16.936 CST [7425] LOG: database system is ready to accept connections done server started [pgsql@easha1 ~]$

[pgsql@easha1 ~]$ pg_ctl stop -D $PGDATA -m fast waiting for server to shut down....2022-01-05 11:02:50.390 CST [7425] LOG: received fast shutdown request 2022-01-05 11:02:50.391 CST [7425] LOG: aborting any active transactions 2022-01-05 11:02:50.392 CST [7425] LOG: background worker "logical replication launcher" (PID 7433) exited with exit code 1 2022-01-05 11:02:50.392 CST [7427] LOG: shutting down 2022-01-05 11:02:50.423 CST [7425] LOG: database system is shut down done server stopped [pgsql@easha1 ~]$

转晨曦

PostgreSQL 启动、停止

pt_ctl  start/stop/reload -D $PGDATA

kill -9 干掉进程…

select pg_terminate_backend(pid) ;