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Re: connection limit exceeded

From: "Tena Sakai" <tsakai(at)gallo(dot)ucsf(dot)edu>
To: "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com>
Cc: <pgsql-admin(at)postgresql(dot)org>
Subject: Re: connection limit exceeded
Date: 2007-11-30 20:34:37
Message-ID: FE44E0D7EAD2ED4BB2165071DB8E328C03062DF0@egcrc-ex01.egcrc.org (view raw or flat)
Thread:
Lists: pgsql-admin
Hi Jonah,

Many thanks!

>>  2) how would I look at the "open/used" connections?
> select * from pg_stat_activity;

This is a wonderful view!  How would I properly terminate
these (of course there are 99 of them!) these query process?
Should I do this from unix or is there any postgres tool I
can use?

Thank you.

Regards,

Tena Sakai
tsakai(at)gallo(dot)ucsf(dot)edu



-----Original Message-----
From: Jonah H. Harris [mailto:jonah(dot)harris(at)gmail(dot)com]
Sent: Fri 11/30/2007 12:03 PM
To: Tena Sakai
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: [ADMIN] connection limit exceeded
 
On Nov 30, 2007 2:55 PM, Tena Sakai <tsakai(at)gallo(dot)ucsf(dot)edu> wrote:
>  On my postgres 8.1.1, I get a response
>    psql: FATAL:  connection limit exceeded for non-superusers

>  1) Is this to do with max_connections setting in the postgres
>     configuration file?  (my setting is 100 (I think this is the
>     default).)

Yep.

>  2) how would I look at the "open/used" connections?

select * from pg_stat_activity;

>  3) should I try restarting postgres without changing the setting?

Has to be restarted for change to take effect.

>  4) what repercussion would there be if I increase this number to,
>     say, 200? (and would that be a good idea?)

A little overhead, nothing bad.

>  5) finally, what's the best fix?  (Do I need to go to pgpool?)

see pgbouncer

-- 
Jonah H. Harris, Sr. Software Architect | phone: 732.331.1324
EnterpriseDB Corporation                | fax: 732.331.1301
499 Thornall Street, 2nd Floor          | jonah(dot)harris(at)enterprisedb(dot)com
Edison, NJ 08837                        | http://www.enterprisedb.com/

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