Why is my Silverlight application using so much un-managed memory?

Question

I have a rather simple Silverlight application, lately we've been having reports from users of the application crashing after several hours of use (4+). We started digging into the application and noticed that the un-managed portion of memory being used by the application starts very high and continues to grow unchecked. The other heaps seem to be managed just fine. I've done a lot of research and even went as far removing all images from my application and the un-managed memory continues to grow.

I'm just confused at this point as to what exactly is consuming all the un-managed memory in my application and what I can do about it. Here is a snapshot of my application after initial load, as you can see it's already using over 100MB of un-managed memory space. I'm just looking for any guidance here on what objects could be in un-managed memory and what to do to reduce the amount of un-managed memory my application is using. Thanks!

I've taken another snapshot or two using the .NET Memory Profiler and it appears that the Kernel-HeapMemory is the largest chunk. Not sure if this helps much but I thought I would post it anyway.

Answer 1

Have you tried the CLR Profiler for Silverlight? I've used it with some success in the past to troubleshoot memory issues.