ASP.NET web application hangs?

Question

IIS

Hello.
Recently ran into a problem.
I have one project written in ASP.NET 3.5(WebForms). Spinning on IIS 7.5.
So, in the evenings (sometimes several times a day), the pool process begins to eat up 100% of the processor time. And everything, in general, hangs. Temporarily solved the problem by setting the process to restart automatically. But even a minute of server downtime negatively affects user loyalty. Especially when it happens several times a day.
I understand that most likely, somewhere in the code there is a bug that generates an infinite loop. The project is quite large, there is a lot of code written by different developers, so line-by-line search is not considered.
Has anyone encountered such a problem? Please help me figure out what's wrong.
Thank you.

Answer 1

try dumping the memory and see where the memory leak occurs

Answer 2

Can it help to get the method name through the GetMethod() method of the System.Diagnostics.StackFrame class ( msdn.microsoft.com/en-us/library/system.diagnostics.stackframe.aspx ) for a thread that is 100%?