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IIS Services Are Using 100% of CPU

Issue

IIS worker processes are using a large share of the CPU. Web applications is moving very slowly.

Product Line

Power Monitoring Expert 8.2

Power Monitoring Expert 9.0

Power Monitoring Expert 2020 (9.1)

Power Monitoring Expert 2021

Power Monitoring Expert 2022

Power Monitoring Expert 2023

Power Monitoring Expert 2024

Environment

Internet Information Services (IIS)

Web Applications

Cause

Undersized systems can occasionally be overwhelmed by the number of requests that IIS must handle. It is important to reference the system guide when designing hardware and IT requirements for each PME system. PME systems are unique and must be accurately designed for expected growth.


Resolution

The IIS worker processes' CPU usage can be throttled.

Search for IIS on the Windows Server.

IIS search

Open up Worker Processes.

worker processes

Identify which application pool is using the most CPU.

worker processes cpu usage

Click on Application Pools ->  right click on highest CPU usage Application Pool -> Advanced Settings. Write in the max amount of CPU this application pool can use (recommended minimum of 70%). Press okay.

application pools

Run CMD prompt as an administrator. Perform an IIS reset.

iisreset

Schneider Electric Egypt and North East Africa

IIS Services Are Using 100% of CPU

Issue

IIS worker processes are using a large share of the CPU. Web applications is moving very slowly.

 

Product Line

Power Monitoring Expert 8.2

Power Monitoring Expert 9.0

Power Monitoring Expert 2020 (9.1)

Power Monitoring Expert 2021 

Power Monitoring Expert 2022

Power Monitoring Expert 2023

Power Monitoring Expert 2024

 

Environment

Internet Information Services (IIS)

Web Applications

 

Cause

Undersized systems can occasionally be overwhelmed by the number of requests that IIS must handle. It is important to reference the system guide when designing hardware and IT requirements for each PME system. PME systems are unique and must be accurately designed for expected growth.


Resolution

The IIS worker processes' CPU usage can be throttled.

 

Search for IIS on the Windows Server.

IIS search

 

Open up Worker Processes.

worker processes

 

Identify which application pool is using the most CPU.

 

worker processes cpu usage

 

Click on Application Pools ->  right click on highest CPU usage Application Pool -> Advanced Settings. Write in the max amount of CPU this application pool can use (recommended minimum of 70%). Press okay.

application pools

 

Run CMD prompt as an administrator. Perform an IIS reset.

iisreset

Schneider Electric Egypt and North East Africa

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