public PerfBucketMetrics(long value){
  Validate.isTrue(value >= 0,Long.toString(value));
  hits=1;
  totalMs=value;
  ceilingMs=value;
  effectiveCeilingMs=0;
  floorMs=value;
}

public PerfBucketMetrics ( long value ) { Validate . isTrue ( value >= 0 , Long . toString ( value ) ) ; hits = 1 ; totalMs = value ; ceilingMs = value ; effectiveCeilingMs = 0 ; floorMs = value ; }
c ' tor of a metric object with first data entry
