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Re: connection limit exceeded

From: "Tena Sakai" <tsakai(at)gallo(dot)ucsf(dot)edu>
To: "Usama Dar" <munir(dot)usama(at)gmail(dot)com>
Cc: "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com>,<pgsql-admin(at)postgresql(dot)org>
Subject: Re: connection limit exceeded
Date: 2007-11-30 21:28:30
Message-ID: FE44E0D7EAD2ED4BB2165071DB8E328C03062DF2@egcrc-ex01.egcrc.org (view raw or flat)
Thread:
Lists: pgsql-admin
Many thanks, Usama!

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


-----Original Message-----
From: Usama Dar [mailto:munir(dot)usama(at)gmail(dot)com]
Sent: Fri 11/30/2007 1:24 PM
To: Tena Sakai
Cc: Jonah H. Harris; pgsql-admin(at)postgresql(dot)org
Subject: Re: [ADMIN] connection limit exceeded
 
On Dec 1, 2007 1:34 AM, Tena Sakai <tsakai(at)gallo(dot)ucsf(dot)edu> wrote:

>  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?
>

try pg_cancel_backend(pid)

>
>
> 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<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/
>
>


-- 
Usama Munir Dar http://linkedin.com/in/usamadar
Consultant Architect
Cell:+92 321 5020666
Skype: usamadar

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