如何杀死我所有的postgresql连接?
我试着耙db:下降，但我得到:
ERROR: database "database_name" is being accessed by other users
DETAIL: There are 1 other session(s) using the database.
我尝试过关闭我从ps -ef | grep postgres中看到的进程，但这也不起作用:
kill: kill 2358 failed: operation not permitted
当前回答
我使用下面的rake任务来覆盖Rails drop_database方法。
lib / database.rake
require 'active_record/connection_adapters/postgresql_adapter'
module ActiveRecord
module ConnectionAdapters
class PostgreSQLAdapter < AbstractAdapter
def drop_database(name)
raise "Nah, I won't drop the production database" if Rails.env.production?
execute <<-SQL
UPDATE pg_catalog.pg_database
SET datallowconn=false WHERE datname='#{name}'
SQL
execute <<-SQL
SELECT pg_terminate_backend(pg_stat_activity.pid)
FROM pg_stat_activity
WHERE pg_stat_activity.datname = '#{name}';
SQL
execute "DROP DATABASE IF EXISTS #{quote_table_name(name)}"
end
end
end
end
编辑:这是Postgresql 9.2+
其他回答
关于运行进程的所有信息:
SELECT *, pg_terminate_backend(pid)
FROM pg_stat_activity
WHERE pid <> pg_backend_pid()
AND datname = 'my_database_name';
在PG管理中，您可以断开您的服务器(右键单击服务器)&所有会话将在重新启动时断开
MacOS，如果postgresql安装了brew:
brew services restart postgresql
UBUNTU,
首先用这个检查(在后台运行的kill服务器)
sudo kill -9 $(lsof -i :3000 -t)
如果你没有找到pid，那么你只需要重新启动 Postgresql服务的命令如下所示:
sudo service postgresql restart
如果你需要断开一个特定用户的会话，这有助于我:
检查当前所有连接:
select * from pg_stat_activity;
授予你的用户一个角色(不重要):
set role "db_admin";
杀死届:
select pg_terminate_backend(pid)
from pg_stat_activity
where usename = '*** USER NAME TO DISCONNECT ***';
案例: 查询执行失败:
DROP TABLE dbo.t_tabelname
解决方案: a.显示查询状态活动如下:
SELECT * FROM pg_stat_activity ;
b.查找“查询”列包含的行:
'DROP TABLE dbo.t_tabelname'
c.在同一行中，获取“PID”列的值
example : 16409
d.执行以下脚本:
SELECT
pg_terminate_backend(25263)
FROM
pg_stat_activity
WHERE
-- don't kill my own connection!
25263 <> pg_backend_pid()
-- don't kill the connections to other databases
AND datname = 'database_name'
;
