Move Windows server 2012 R2 to Windows Server 2019 IIS w3wp.exe 100% CPU usage - Microsoft Community Hub
![windows - How can you know what is w3wp.exe doing? (or how to diagnose a performance problem) - Server Fault windows - How can you know what is w3wp.exe doing? (or how to diagnose a performance problem) - Server Fault](https://i.stack.imgur.com/ohKp6.png)
windows - How can you know what is w3wp.exe doing? (or how to diagnose a performance problem) - Server Fault
![w3wp.exe' (IIS Worker Process) process CPU is 99% - Controller client slow, and often says "Not Responding" - caused by importing unusually large (corrupt) CSV file w3wp.exe' (IIS Worker Process) process CPU is 99% - Controller client slow, and often says "Not Responding" - caused by importing unusually large (corrupt) CSV file](https://www.ibm.com/support/pages/system/files/inline-images/image-20190215144429-3.png)
w3wp.exe' (IIS Worker Process) process CPU is 99% - Controller client slow, and often says "Not Responding" - caused by importing unusually large (corrupt) CSV file
![How to find out working processes behind a CPU peak? - Application Performance Monitoring - New Relic Explorers Hub How to find out working processes behind a CPU peak? - Application Performance Monitoring - New Relic Explorers Hub](https://nr-production-discourse.s3.dualstack.us-east-1.amazonaws.com/original/3X/f/2/f209b542a85d4b8d8cc651b1afc5fb8d0bac04f7.png)
How to find out working processes behind a CPU peak? - Application Performance Monitoring - New Relic Explorers Hub
![windows server 2008 r2 - High CPU usage of IIS process (w3wp.exe) because of many slow clr.dll!CopyPDBs - Server Fault windows server 2008 r2 - High CPU usage of IIS process (w3wp.exe) because of many slow clr.dll!CopyPDBs - Server Fault](https://i.stack.imgur.com/hkhDs.png)