Flag for advanced configuration of Bazel's internal Skyframe engine. If
Bazel detects its retained heap percentage usage exceeds the threshold set
by --skyframe_high_water_mark_threshold, when a minor GC event occurs, it
will drop unnecessary temporary Skyframe state, up to this many times per
invocation. Defaults to 10. Zero means that minor GC events will never
trigger drops. If the limit is reached, Skyframe state will no longer be
dropped when a minor GC event occurs and that retained heap percentage
threshold is exceeded.