Cross-posting for visibility.
We can confirm that the significant contributor to the issue that has been reported in this thread and others is related to a Linux kernel change in 6.6. While swap adjustments proposed can mitigate the issue to some degree, the multi-gen LRU code in question will be disabled by default in a subsequent Dragonfish patch release, and should resolve the problem. This can be done in advance following the directions below from @mav. Thanks to all of the community members who helped by reporting the issue which aided in reaching the root cause. Additional feedback is welcome from those who apply the change below.