You CAN fix the memory leaks and reduce w3wp memory usage (in production).
(It's more doable than you think)
Here is the full guide: bit.ly/w3wp-memory
IIS monitoring: tons of metrics and no action ...
In case you missed it, here is a blueprint for PROACTIVELY improving website performance: bit.ly/iis-monitoring
What about #ASYNC hangs?
Those are even more gnarly to debug ...
Here is our new guide on fixing async await hangs in aspnet core, mvc and webapi apps! bit.ly/async-hangs