s: { enabled: false },
  xAxis: {
    title: {
      enabled: true,
      text: 'Global number of requests per second',
      style: { fontWeight: 'bold' }
    },
    startOnTick: true,
    endOnTick: true,
    showLastLabel: true,
    min: 0
  },
  title: { text: 'A title to let highcharts reserve the place for the title set later' },
  yAxis: {
    min: 0,
    title: { text: 'Response Time (ms)' }
  },
  tooltip: {
    formatter: function() {
         return ''+ this.y +' ms at ' + this.x + ' allreq/s';
 