杀死一个postgresql会话/连接 [英] Kill a postgresql session/connection

问题描述

如何杀死所有我的postgresql连接？

How can I kill all my postgresql connections?

我试图 rake db：drop 我得到：

ERROR:  database "database_name" is being accessed by other users
DETAIL:  There are 1 other session(s) using the database.

我试过关闭从 ps -ef | grep postgres ，但这不起作用：

I've tried shutting down the processes I see from a ps -ef | grep postgres but this doesn't work either:

kill: kill 2358 failed: operation not permitted

推荐答案

您可以使用 pg_terminate_backend（）来终止连接。您必须是超级用户才能使用此功能。这在所有操作系统上都是一样的。

You can use pg_terminate_backend() to kill a connection. You have to be superuser to use this function. This works on all operating systems the same.

SELECT 
    pg_terminate_backend(pid) 
FROM 
    pg_stat_activity 
WHERE 
    -- don't kill my own connection!
    pid <> pg_backend_pid()
    -- don't kill the connections to other databases
    AND datname = 'database_name'
    ;

在执行此查询之前，您必须 REVOKE CONNECT权限以避免新连接：

Before executing this query, you have to REVOKE the CONNECT privileges to avoid new connections:

REVOKE CONNECT ON DATABASE dbname FROM PUBLIC, username;

如果你使用Postgres 8.4-9.1，使用procpid而不是pid

If you're using Postgres 8.4-9.1 use procpid instead of pid

SELECT 
    pg_terminate_backend(procpid) 
FROM 
    pg_stat_activity 
WHERE 
    -- don't kill my own connection!
    procpid <> pg_backend_pid()
    -- don't kill the connections to other databases
    AND datname = 'database_name'
    ;

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