What about postgres? How many connections is it making available?  
You'll want to roughly multiply it by the number of webapplications  
your running, so for instance

db.maxconnections = 50
db.maxwait = 5000
db.maxidle = 5

running dspace.war, dspace-oai.war and dspace-srw.war postgres needs  
about 150 connections in it postgres.conf.  I usually increment that  
by one for cron jobs as well:


for instance in my current config we run two virtual hosts with 3  
webapps each and 1 set for crons:

2 vhosts *( 3 webservices +1 cron) * 50 in pool = 400

> #--------------------------------------------------------------------- 
> ------
> # CONNECTIONS AND AUTHENTICATION
> #--------------------------------------------------------------------- 
> ------
>
> max_connections = 400
> # note: increasing max_connections costs ~400 bytes of shared  
> memory per
> # connection slot, plus lock space (see  
> max_locks_per_transaction).  You
> # might also need to raise shared_buffers to support more connections.

Its not a hard-fast rule, we never really exhaust that many  
connections in one instance, but somewhere between that and the  
default "100" there is a sweet spot.

-Mark

On Jan 19, 2007, at 11:43 AM, Jose Blanco wrote:

> Actually I mean, more frequently today.  Sorry about that.
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of  
> Jose Blanco
> Sent: Friday, January 19, 2007 11:42 AM
> To: 'Dorothea Salo'
> Cc: dspace-tech@lists.sourceforge.net
> Subject: Re: [Dspace-tech] connections to db seem to be getting stuck
>
> It was dying on us a couple of times a week, but for some reason,  
> it's dying
> more frequently this week.  Could you share your config db parameters.
> Right now I have the default settings.
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of  
> Dorothea
> Salo
> Sent: Friday, January 19, 2007 11:28 AM
> Cc: dspace-tech@lists.sourceforge.net
> Subject: Re: [Dspace-tech] connections to db seem to be getting stuck
>
> Jose Blanco wrote:
>> So what do you do?  Restart tomcat all day long?  For some reason,  
>> it is
>> happening very frequently today.  It's making the system kind of  
>> unusable
>> when every 30 minutes to an hour tomcat has to be restarted.
>
>       That often? Wow. It dies on us a couple of times a week, and not
> always for
> this reason as best I can tell.
>
>> It's a bit comforting to know it's not just my problem.  Will you  
>> be at
> the
>> Open repository conference in San Antonio next week?  I'll be  
>> there, and
>> hope we can get some help on this.
>
>       Agreed! And yes, I will be there.
>
> Dorothea
>
> -- 
> Dorothea Salo, Digital Repository Services Librarian
> (703)993-3742     [EMAIL PROTECTED]     AIM: gmumars
> MSN 2FL, Fenwick Library
> George Mason University
> 4400 University Drive, Fairfax VA 22031
>
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Mark R. Diggory
~~~~~~~~~~~~~
DSpace Systems Manager
MIT Libraries, Systems and Technology Services
Massachusetts Institute of Technology



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