JDK 29 will likely include these three JEPs:

• Make G1 the Default Garbage Collector in All Environments
• JEP draft: Automatic Heap Sizing for G1
• JEP draft: Automatic Heap Sizing for ZGC

The first two will likely be sufficient to:

• Use the default GC from upstream - drop -XX:+UseParallelGC from our scripts
• Perform sufficient memory tuning by automatically right-sizing the heap - drop -XX:+MaxRAMPercentage=80.0 from our scripts.

... and possibly more (like the explicit configuration for GC). We need to make sure to research this and adapt/simplify our scripts accordingly.