Re: [RadiusNT] Recommended memory/hardware for RadiusNT

Michael Hobach ( (no email) )
Thu, 1 Jul 1999 10:09:24 -0500

We see this on other servers quite often - the problem is not with
RadiusNT, it is with your NT configuration and ODBC.

There are documented memory leaks with ODBC and we have
noticed most when using ODBC to connect to an Access
database. It doesn't seem to be as big of a problem with SQL.

Our fix was to use a 'CRON' application to stop and start the
service(s) that connect through ODBC. There are also new ODBC
drivers available from Microsoft that reportedly correct most of the

We have been using RadiusNT for almost three years now and
have had a very stable server with 128Mb of RAM. In May we
upgraded the server to SQL from Access and felt it necessary to
install 256Mb (on a single processor machine) only because of

The most important thing to do first is to setup NT's pagefile size
correctly - if this is setup properly you should not get the warnings
that you are now getting...

Go to [Start] -> Settings -> Control Panel -> System ->

Under 'Virtual Memory' click on [Change] - the minimum page size
should be at least the amount of memory that you have in the
machine. NT will suggest 139Mb as the minimum. You may want
to select more as the minimum like 156Mb or so - we usually
determine this by how the server is used. If you have not done this
before it will be set too low as a default from your initial NT
installation. Next define the maximum size. My recommendation
is to set it to twice the amount of memory you have in the machine
if you have the room. In this case set it to 256Mb.

Unless you have the virtual memory configured properly, throwing
more physical memory at it will do nothing.

Email from: Graeme Slogrove <>

On 1 Jul 99, at 14:35, Graeme Slogrove wrote

> Hi,
> What is the minimum amount of memory and the recommended amount for
> RadiusNT ?
> And hardware suggestions ?
> We had a P-II 400Mhz with 128MB RAM and quite often got a "System Low On
> Virtual Memory" error.
> We upgraded to 256Mb yesterday, in the hope this will solve it.
> Regards,
> Graeme
> ---
> Graeme Slogrove, BSc (Eng) Elec (Wits)
> Director, Systems Development & Value Added Services
> NetActive Internet
> Tel: 011-719-0333 Fax: 011-719-0444
> Support: 011-719-0300

Michael Hobach <>
CyberLynk Network, Inc.
5801 Washington Ave
Racine, WI 53406
(414) 884-1088 Fax (414) 884-1053

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