Limiting persistant connections with IIS

I'm running a PHP app on windows 2000 / IIS using unified ODBC to connect to MS-SQL. I would like to connect to the database using persistant connections but need to limit the total number of connections to avoid swamping the database. It seems that a new connection is created for every request made to the webserver at least for the first few tens of requests - presumably a new php thread is being created for each request. I've tried limiting the maximum connections allowed by IIS for the website - but this does not appear to affect the number of PHP threads holding persistant connections to the db. I have set odbc.max_links in the php.ini file in case it is a bug in my program opening lots of connections but with maximum connections for IIS being set to 20 and max_links 4 I still end up with several hundred database connections after a few hundred page requests. If I was implementing this on apache (which I have much more experience of using) I would use the MaxClients directive to achieve this... Does anyone know how to limit the number of persistant database connections on windows/IIS/PHP? cheer Simon -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Simon Rees | srees@nildram.co.uk | ORA-03113: end-of-file on communication channel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~