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 full GC event occurs, it will drop unnecessary temporary Skyframe state, up to this many times per invocation. Defaults to 10. Zero means that full GC events will never trigger drops. If the limit is reached, Skyframe state will no longer be dropped when a full GC event occurs and that retained heap percentage threshold is exceeded.