private static void WriteHistogram(StringBuilder sb, HistogramMetric histogram)
{
var percentiles = histogram.Percentiles(0.5, 0.75, 0.95, 0.98, 0.99, 0.999);
sb.AppendFormat(" min = {0:F2}\n", histogram.Min);
sb.AppendFormat(" max = {0:F2}\n", histogram.Max);
sb.AppendFormat(" mean = {0:F2}\n", histogram.Mean);
sb.AppendFormat(" stddev = {0:F2}\n", histogram.StdDev);
sb.AppendFormat(" median = {0:F2}\n", percentiles[0]);
sb.AppendFormat(" 75%% <= {0:F2}\n", percentiles[1]);
sb.AppendFormat(" 95%% <= {0:F2}\n", percentiles[2]);
sb.AppendFormat(" 98%% <= {0:F2}\n", percentiles[3]);
sb.AppendFormat(" 99%% <= {0:F2}\n", percentiles[4]);
sb.AppendFormat(" 99.9%% <= {0:F2}\n", percentiles[5]);
}
private static void WriteHistogram(TextWriter writer, HistogramMetric histogram)
{
var percentiles = histogram.Percentiles(0.5, 0.75, 0.95, 0.98, 0.99, 0.999);
writer.Write(" min = %{0:2}\n", histogram.Min);
writer.Write(" max = %{0:2}\n", histogram.Max);
writer.Write(" mean = %{0:2}\n", histogram.Mean);
writer.Write(" stddev = %{0:2}\n", histogram.StdDev);
writer.Write(" median = %{0:2}\n", percentiles[0]);
writer.Write(" 75%% <= %{0:2}\n", percentiles[1]);
writer.Write(" 95%% <= %{0:2}\n", percentiles[2]);
writer.Write(" 98%% <= %{0:2}\n", percentiles[3]);
writer.Write(" 99%% <= %{0:2}\n", percentiles[4]);
writer.Write(" 99.9%% <= %{0:2}\n", percentiles[5]);
}
private void LogHistogram(IRequest request, MetricName metricName, HistogramMetric metric, long timestamp)
{
LogGauge(request, metricName.Name + "." + HistogramMetrics.Max.GetDatadogName(), metric.SampleMax, timestamp);
LogGauge(request, metricName.Name + "." + HistogramMetrics.Min.GetDatadogName(), metric.SampleMin, timestamp);
LogGauge(request, metricName.Name + "." + HistogramMetrics.Mean.GetDatadogName(), metric.SampleMean, timestamp);
LogGauge(request, metricName.Name + "." + HistogramMetrics.StdDev.GetDatadogName(), metric.StdDev, timestamp);
LogGauge(request, metricName.Name + "." + HistogramMetrics.Count.GetDatadogName(), metric.SampleCount, timestamp);
double[] percentResults = metric.Percentiles(_histogramPercentages);
LogGauge(request, metricName.Name + "." + HistogramMetrics.At75thPercentile.GetDatadogName(), percentResults[0], timestamp);
LogGauge(request, metricName.Name + "." + HistogramMetrics.At95thPercentile.GetDatadogName(), percentResults[1], timestamp);
LogGauge(request, metricName.Name + "." + HistogramMetrics.At98thPercentile.GetDatadogName(), percentResults[2], timestamp);
LogGauge(request, metricName.Name + "." + HistogramMetrics.At99thPercentile.GetDatadogName(), percentResults[3], timestamp);
LogGauge(request, metricName.Name + "." + HistogramMetrics.At999thPercentile.GetDatadogName(), percentResults[4], timestamp);
metric.Clear();
}
public void HistogramPercentages()
{
Metrics metrics = new Metrics();
HistogramMetric histogramMetric = metrics.Histogram("test", "HealthMetrics.Test.HistogramMetrics");
for (int x = 1; x <= 100; x++)
{
histogramMetric.Update(x);
}
double[] percentials = { 0.75, 0.99, 0.999 };
double[] results = histogramMetric.Percentiles(percentials);
Assert.IsNotNull(results);
Assert.AreEqual(3, results.Length);
Assert.AreEqual(75, results[0], 1);
Assert.AreEqual(99, results[1], 1);
Assert.AreEqual(99, results[2], 1);
}
public static HistogramData GetHistogramData(this HistogramMetric histogram, double[] percentiles)
{
var percentileValues = histogram.Percentiles(percentiles);
return(new HistogramData
{
Counter = histogram.Count,
Max = histogram.Max,
Mean = histogram.Mean,
Min = histogram.Min,
Stdev = histogram.StdDev,
Percentiles = new Dictionary <string, double>
{
{ string.Format("{0}%", percentiles[0]), percentileValues[0] },
{ string.Format("{0}%", percentiles[1]), percentileValues[1] },
{ string.Format("{0}%", percentiles[2]), percentileValues[2] },
{ string.Format("{0}%", percentiles[3]), percentileValues[3] },
{ string.Format("{0}%", percentiles[4]), percentileValues[4] },
{ string.Format("{0}%", percentiles[5]), percentileValues[5] },
}
});
}
private static HistogramData CreateHistogramData(HistogramMetric histogram)
{
double[] percentiles = histogram.Percentiles(0.5, 0.75, 0.95, 0.99, 0.999, 0.9999);
return(new HistogramData
{
Counter = histogram.Count,
Max = histogram.Max,
Mean = histogram.Mean,
Min = histogram.Min,
Stdev = histogram.StdDev,
Percentiles = new Dictionary <string, double>
{
{ "50%", percentiles[0] },
{ "75%", percentiles[1] },
{ "95%", percentiles[2] },
{ "99%", percentiles[3] },
{ "99.9%", percentiles[4] },
{ "99.99%", percentiles[5] },
}
});
}