Re: killing idle attaches without killing others

How does PG determine if a process is <IDLE> ?  It there some sort of timeout?  I want to be able to distinguish
betweensomene who's interrupted on the phone for a couple minutes vs the guy who left the program running over the
weekend.



-----Original Message-----
From: pgsql-general-owner@postgresql.org [mailto:pgsql-general-owner@postgresql.org] On Behalf Of Dean Rasheed
Sent: Wednesday, August 04, 2010 10:26 AM
To: Vick Khera
Cc: pgsql-general
Subject: Re: [GENERAL] killing idle attaches without killing others

On 4 August 2010 15:18, Vick Khera <vivek@khera.org> wrote:
> On Wed, Aug 4, 2010 at 10:03 AM, Gauthier, Dave <dave.gauthier@intel.com>
> wrote:
>>
>> How can one kill just the <IDLE> processes I see attached to a DB (from
>> pg_stat_activity) without disturbing the others?  If I need to kill the idle
>> pids one ata time, which signal_name should I use for that?
>>
>>
>
> Connected to psql as a superuser, issue SELECT pg_cancel_backend(PID); where
> PID is the pid of the process to close.

That's a SIGINT, but it doesn't actually kill the process, it just
cancels it's current query.

pg_terminate_backend() sends a SIGTERM to terminate the backend. I
think that function is new to 8.4, but you can still manually send the
signal if you're on 8.3.

http://www.postgresql.org/docs/current/static/functions-admin.html

Regards,
Dean

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