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Support Article

Poor performance with Pega 7 application using high CPU on JVM



You see high CPU usage on the JVM running a Pega 7 application, and the application response time deteriorates with time.

Error Messages

Not Applicable

Steps to Reproduce

Use Java 7 with the Pega 7 Platform.

Root Cause

A defect or configuration issue in the operating environment

This is a problem only for Java 7: It has a low default ReservedCodeCacheSize setting and it swallows error messages that would otherwise inform the user that a higher setting is needed.


Perform the following local-change to the operating environment:
Add Java Option -XX:ReservedCodeCacheSize=512m to the JVM.

Refer to this PDN article for more detail:

Published March 29, 2017 - Updated October 8, 2020

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