In particular, the following resources were targeted to troubleshoot IIS 6 and caching in older systems. You’re probably NOT a web admin if you’re reading this blog so don’t flush or kill anything without permissions.
IIS RESET VS APP POOL RECYCLE
The difference between IIS reset and application pool recycle in affecting of cache
IISRESET vs Recycling Application Pools
WORKER PROCESSES
Identifying Worker Process (w3wp.exe) – IIS 6.0 and IIS 7.0 for Debugging ASP.NET Application
Find PID for IIS Application Pool’s Worker Process
How to Troubleshoot IIS Worker Process (w3wp) High CPU Usage
ASP.NET CACHING
Microsoft WebServer, ASP, IIS, & Caching
ASP.NET / MemoryCache behaviour for w3wp worker process memory usage