![Troubleshoot high CPU usage in an IIS application pool - Internet Information Services | Microsoft Learn Troubleshoot high CPU usage in an IIS application pool - Internet Information Services | Microsoft Learn](https://learn.microsoft.com/en-us/troubleshoot/developer/webapps/iis/health-diagnostic-performance/media/troubleshoot-high-cpu-in-iis-app-pool/select-performance-counters-dialog.png)
Troubleshoot high CPU usage in an IIS application pool - Internet Information Services | Microsoft Learn
![Troubleshoot high CPU usage in an IIS application pool - Internet Information Services | Microsoft Learn Troubleshoot high CPU usage in an IIS application pool - Internet Information Services | Microsoft Learn](https://learn.microsoft.com/en-us/troubleshoot/developer/webapps/iis/health-diagnostic-performance/media/troubleshoot-high-cpu-in-iis-app-pool/perf-monitor-w3wp-cpu-usage.png)
Troubleshoot high CPU usage in an IIS application pool - Internet Information Services | Microsoft Learn
![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-20190215143803-1.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
![Net Core Host process High CPU usage in Windows 2016 IIS in Asp.Net Core 2.2 Application - Stack Overflow Net Core Host process High CPU usage in Windows 2016 IIS in Asp.Net Core 2.2 Application - Stack Overflow](https://i.stack.imgur.com/ywubO.png)
Net Core Host process High CPU usage in Windows 2016 IIS in Asp.Net Core 2.2 Application - Stack Overflow
![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)
windows server 2008 r2 - High CPU usage of IIS process (w3wp.exe) because of many slow clr.dll!CopyPDBs - Server Fault
![Troubleshoot high CPU usage in an IIS application pool - Internet Information Services | Microsoft Learn Troubleshoot high CPU usage in an IIS application pool - Internet Information Services | Microsoft Learn](https://learn.microsoft.com/en-us/troubleshoot/developer/webapps/iis/health-diagnostic-performance/media/troubleshoot-high-cpu-in-iis-app-pool/windows-task-manager-w3wp.png)