"Keep swap space below few hundred megabytes but above zero" is a good example of a rule of thumb. "Make the swap large enough to keep all inactive anonymous p

"Keep swap space below few hundred megabytes but above zero" is a good example of a rule of thumb. "Make the swap large enough to keep all inactive anonymous pages after the workload has stabilized, but not too large to cause swap thrashing and a delayed OOM kill if a fast memory leak happens" is not.