After almost "going crazy" with this problem, I found out that the
problem was in the client application and happened only at specific
scenarios fitting a conjunction of several factors (Murphi's law).

Now I'll enable DummyPacketInterval again and see how it goes.

[]s
Carlos H. Cantu
www.FireBase.com.br - www.firebirdnews.org
www.warmboot.com.br - blog.firebase.com.br

CHC> I was aware of this "warning", and I don't think it is the cause of
CHC> the problem I'm facing. It affects only Windows 2K (and maybe older
CHC> windows).

CHC> I do not have the "power" of setting TCP KeepAlive in that Linux
CHC> server. It is another company who deal with the server. I asked them to
CHC> do that many times before, but my requests was ignored, that's why I
CHC> tried DummyPacketInterval.

CHC> Carlos
CHC> Firebird Performance in Detail -
CHC> http://videos.firebirddevelopersday.com
CHC> www.firebirdnews.org - www.FireBase.com.br

AF>> Hi,

>>> After enabling the DummyPacketInterval parameter on firebird.conf, and
>>> set it to 60 (= 1 minute), some of the terminal machines started to
>>> have problems. They ran my application (made in Delphi + IBO) and
>>> during the connection process, the application just disappears from
>>> the taskmgr

AF>> that's what FIREBIRD.CONF says about using Dummy packets:

AF>> # DO NOT USE THIS OPTION. It may hang or crash Windows on the client side as
AF>> # explained here:
AF>> http://support.microsoft.com/default.aspx?kbid=296265
AF>> # or may not prevent eventual inactive client disconnection for other OS.


AF>> So, that sould explain the behavior you're describing.

AF>> If you use FB 2.1, just set TCP KeepAliveTime to 1 minute and you're done.
AF>> (that should be possible to be done in FB 1.5 too... but it really do not
AF>> work in Windows... maybe next 1.5 build fix it!)


AF>> Regards,
AF>> Anderson



CHC> ------------------------------------

CHC> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

CHC> Visit http://www.firebirdsql.org and click the Resources item
CHC> on the main (top) menu. Try Knowledgebase and FAQ links !

CHC> Also search the knowledgebases at http://www.ibphoenix.com

CHC> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
CHC> Yahoo! Groups Links