How to write memory usage log in ASP.NET

Question

We got "out of memory" issue on production servers. What API can we use to get live memory (physical and managed) usage of the ASP.NET application?

Thanks.

PS: we're forbidden to profile memory with tools.

Answer 1

Also an Out of memory doesn't necessarily mean what you think. heavy memory fragmentation due to excessive object creation can be reported as out of memory since the GC is not able to find a continuous block of memory large enough for next (or last attempted) allocation.

Answer 2

.Net performance counters can help you with a number of managed memory related stats.

This page details some of the ones available- http://msdn.microsoft.com/en-us/library/x2tyfybc.aspx

You can use normal windows memory counters to get an overview of non-managed memory- http://msdn.microsoft.com/en-us/library/aa965225(VS.85).aspx