C# - How To Exceed The 60% Memory Limit Of IIS7 In Caching Application

Jun 11, 2010

Pardon if this is more serverfault vs. stackoverflow. It seems to be on the border.

We have an application that caches a large amount of product data for an e-commerce application using ASP.NET caching. This is a dictionary object with 65K elements, and our calculations put the object's size at ~10GB. Problem:

The amount of memory the object consumes seems to be far in excess of our 10GB calculation. BIGGEST CONCERN: We can't seem to use over 60% of the 32GB in the server.

What we've tried so far:

In machine.config/system.web (sf doesn't allow the tags, pardon the formatting):

processModel autoConfig="true" memoryLimit="80"

In web.config/system.web/caching/cache (sf doesn't allow the tags, pardon the formatting):

privateBytesLimit = "20000000000" (and 0, the default of course)
percentagePhysicalMemoryUsedLimit = "90"

Environment:
Windows 2008R2 x64
32GB RAM
IIS7

Nothing seems to allow us to exceed the 60% value.

See screenshot of taskman.

[URL]

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