The message uses the wrong format to describe the threshold percentage at below which old-has-grown triggers are ignored.

The current message:
Ignoring Trigger (OLD): Old has overgrown: usage (200M) is below threshold (50B) after 4 consecutive completed young GCs

should be replaced with something like:
Ignoring Trigger (OLD): Old has overgrown: usage (200M) is below threshold (2457M) after 4 consecutive completed young GCs