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28 May 12 - Bloor - David Norfolk on the recent Informix benchmark "pretty impressive results"... Read
23 May 12 - DBTA - Informix Genero: A Way to Modernize Informix 4GL Applications... Read
9 Apr 12 - Mastering Data Management - Upping the Informix Ante: Advanced Data Tools... Read
22 Mar 12 - developerWorks - Optimizing Informix database access... Read
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24 Feb 12 - developerWorks - Informix Warehouse Accelerator: Continuous Acceleration during Data Refresh... Read
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13 Jan 12 - MC Press online - Informix Dynamic Server Entices New Users with Free Production Edition ... Read
11 Jan 12 - Computerworld - Ecologic Analytics and Landis+Gyr -- Suitors Decide to Tie the Knot... Read
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8 Sep 11 - TMCnet.com - IBM Offers Database Solution to Enable Smart Meter Data Capture... Read
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8 Jul 11 - Database Trends and Applications - Managing Time Series Data with Informix... Read
31 May 11 - Smart Grid - The meter data management pitfall utilities are overlooking... Read
27 May 11 - IBM Data Management Magazine - IIUG user view: Big data, big time ( Series data, warehouse acceleration, and 4GLs )... Read
16 May 11 - Business Wire - HiT Software Announces DBMoto for Enterprise Integration, Adds Informix. Log-based Change Data Capture... Read
21 Mar 11 - Yahoo! Finance - IBM and Cable&Wireless Worldwide Announce UK Smart Energy Cloud... Read
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20 Sep 10 - planetIDS.com - ITG analyst paper: Cost/Benefit case for IBM Informix as compared to Microsoft SQL Server... Read
20 Jul 10 - IBM Announcements - IBM Informix Choice Edition V11.50 helps deploy low-cost scalable and reliable solutions for Apple Macintosh and Microsoft Windows... Read
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19 May 10 - ZDNet - IBM software in your home? Pact enables five-city smart meter pilot in Europe... Read
17 March 10 - ZDNet (blog) David Morgenstern - TCO: New research finds Macs in the enterprise easier, cheaper to manage than... Read
17 March 2010 - Virtualization Review - ...key components of Big Blue's platform to the commercial cloud such as its WebSphere suite of application ser vers and its DB2 and Informix databases... Read
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IDS Forum

RE: Informix .Net Provider Connection Pool Issue

Posted By: Sheshnarayan Agrawal
Date: Tuesday, 12 August 2008, at 4:26 a.m.

In Response To: RE: Informix .Net Provider Connection Pool Issue (Mark Tyrer)

As far as I understand, unless you explicitly call Close() from your
application you are not putting the connection back into the pool. When
application calls Close(), provider will take care of putting this into
the available pool (if pool is enabled) instead of going ahead and closing
the physical connection to the server.

Now talking about garbage collection, that means we are destroying the
objects itself hence no question of getting this into the pool !! No
wonder why you are still seeing number of connections opened, it will wait
for garbage collector (which is random!).

I think this is the behavior across all the ADO.NET providers. However I
can't speak 100% for other providers but IMO this is they way connection
pooling works in principle !!

-Shesh

"Mark Tyrer" <mark.tyrer@rtt.co.za>
Sent by: ids-bounces@iiug.org
12/08/2008 12:56
Please respond to
ids@iiug.org

To
ids@iiug.org
cc

Subject
RE: Informix .Net Provider Connection Pool Issue [13060]

While I don't know what I am talking about here (nothing unusual about
that)...

We have also been challenged by this issue. We found that you need to
explicitly close the connection from the application. The .net people here

were a bit miffed about that saying that the library was supposed to be
managed and should implicitly close the connection through the garbage
collection....
-----Original Message-----
From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of
Gaurav
Saxena3
Sent: 12 August 2008 06:00 AM
To: ids@iiug.org
Subject: Re: Informix .Net Provider Connection Pool Issue [13055]

This should work. Anyways, did you try IBM data server .NET driver which
works well with Informix and all the .NET programming expectations ? But
before you do your server should be Cheetah2 ideally.

Thanks and Regards,
Gaurav

"CHRISTOPHER

VOVERIS"

<christopher.j.vo To

veris@ssa.gov> ids@iiug.org

Sent by: cc

ids-bounces@iig.

org Subject

Informix .Net Provider Connection

Pool Issue [13053]

12/08/2008 01:09

Please respond to

ids@iiug.org

I was wondering if any of you can help me out here.

I'm developing an application in Visual Studio 2005 using the .Net
Framework
2.0 connecting to an Informix 9.40C2. I'm using version 3.50.TC1DE of the
Client SDK drivers and I'm having an issue with the database connection
pool.
I'm trying to track down excess connections being created against the
database and it seems that we've narrowed it down to a failure in the .Net

drivers to clear up connections in the connection pool.

To that end, I wrote a quickie test application that uses just the basics:

an
IfxConnection, IfxDataAdapter and IfxCommand object to fill a datatable.

I have the Connection Lifetime argument in the connection string set to 15

(which as far as I understand the documentation, means clean up
connections

after 15 seconds).

Once I open the connection, fill my data adapter and close the connection,

the connection doesn't get closed on the server. I'm querying the
syssessions table where tty = my machine name to get my database
connection
count.

Has anyone here experienced this? Is there anything I can do to clean up
these connections? We have a user base of several hundred people and based

on how

our applications are executed often have 8-13 connections per user that
aren't getting cleaned up. We don't have enough of licensing to support
8-13
connections for 150+ users. I've tried to disable pooling by setting the
Pooling = False option in the connect string but based on the quantity of
database queries going on, performance is awful.

Thanks in advance for any help you can provide.

Chris

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