This is what we did in pretty much all of our monitoring some time ago. We ripped out most memory graphs except for "Total Memory" and "Available Memory" as wel

This is what we did in pretty much all of our monitoring some time ago. We ripped out most memory graphs except for "Total Memory" and "Available Memory" as well as memory pressure from the PSI metrics. And we placed alerts on available memory growing low, as well as pages being swapped in. Newer kernel opportunistically swap-out idle pages, but that's fine as long as you never see the path from disk to memory (swap-in). This has increased the quality of our memory monitoring by a lot.