Garbage Collection Best practices in Clarity 16.2.x+

Products

• Clarity PPM On Premise
• Clarity PPM SaaS

Issue/Introduction

We currently use G1 garbage collection on the ppmbroker nodes and Parallel for the APP and BG nodes.

What is Broadcom's recommendation for Clarity 16.2.x with Java 17.0.x

Environment

All Supported Clarity Releases on Java 17

Resolution

• We recommend setting G1GC for all services on Java 17.
• Please set it in JVM for jvmParameters, example:
  -XX:+UseG1GC
  
• Remove the entries referring to ParallelGC for all services (example -XX:+UseParallelGC must be removed)
• Restart the services.
• We recommend setting it to this value on a lower environment and making sure everything runs well before moving to Production.