Re: Closing all existing PostgreSQL database connections

Norbert Radyk wrote:
> I've got a question about PostgreSQL JDBC API. Is there any way to
> close all existing & open connections to the particular database. I
> mean the connections made by some external programs too.
> 
> I simply need to drop the database to which there are some open
> external connections. I cannot get the java.sql.Connection object in
> order to close the connection, but maybe there is some other way to do
> this?

Unfortunately there's no supported way to terminate individual backends.

 From command line, you can use "kill" to do that, but it's not a very 
well-tested codepath and it's not officially supported. IOW, not 
recommended on production servers.

There's also a tool called "cutter", which let's you terminate any 
TCP/IP connection: http://www.lowth.com/cutter/. I've never used that 
myself, but it seems like a safe option.

The easiest option is to just restart postmaster.

-- 
   Heikki Linnakangas
   EnterpriseDB   http://www.enterprisedb.com