Classic ASP apps on IIS shuts down when memory usage goes over 90%

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http://serverfault.com – I've got an issue where all classic ASP apps on IIS shut down, when the crowded server exceeds 90% memory usage. This is because ASP apps cannot create new sessions any longer. The ASP.NET apps are not affected by this problem and run fine. Is there a any workaround to this problem (expect addition of RAM to server) ? (HowTos)