public PrefetchingBehavior(PrefetchingUser prefetchingUser,
WorkContext context,
BaseBatchSizeAutoTuner autoTuner,
string prefetchingUserDescription,
bool isDefault = false,
Func<int> getPrefetchintBehavioursCount = null,
Func<PrefetchingSummary> getPrefetcherSummary = null)
{
this.context = context;
this.autoTuner = autoTuner;
PrefetchingUser = prefetchingUser;
this.userDescription = prefetchingUserDescription;
this.IsDefault = isDefault;
this.getPrefetchintBehavioursCount = getPrefetchintBehavioursCount ?? (() => 1);
this.getPrefetcherSummary = getPrefetcherSummary ?? GetSummary;
MemoryStatistics.RegisterLowMemoryHandler(this);
LastTimeUsed = DateTime.MinValue;
ingestMeter = context.MetricsCounters.DbMetrics.Meter("metrics",
"ingest/sec", "In memory documents held by this prefetcher", TimeUnit.Seconds);
returnedDocsMeter = context.MetricsCounters.DbMetrics.Meter("metrics",
"returned docs/sec", "Documents being served by this prefetcher", TimeUnit.Seconds);
if (isDefault)
{
context.Database.TransactionalStorage.Batch(accessor =>
{
recentEtag = accessor.Staleness.GetMostRecentDocumentEtag();
});
}
}
public ManualTimerMetric(
TimeUnit durationUnit,
TimeUnit rateUnit,
MeterMetric meter,
HistogramMetric histogram,
bool clear)
: base(durationUnit, rateUnit, meter, histogram, clear)
{
}
public ManualTimerMetric(
TimeUnit durationUnit,
TimeUnit rateUnit,
MeterMetric meter,
HistogramMetric histogram,
bool clear)
: base(durationUnit, rateUnit, meter, histogram, clear)
{
}
protected TimerMetricBase(TimeUnit durationUnit, TimeUnit rateUnit, MeterMetric meter, HistogramMetric histogram, bool clear)
{
DurationUnit = durationUnit;
RateUnit = rateUnit;
_meter = meter;
_histogram = histogram;
if(clear)
{
Clear();
}
}
protected TimerMetricBase(TimeUnit durationUnit, TimeUnit rateUnit, MeterMetric meter, HistogramMetric histogram, bool clear)
{
DurationUnit = durationUnit;
RateUnit = rateUnit;
_meter = meter;
_histogram = histogram;
if (clear)
{
Clear();
}
}
public static MeterMetric New(string eventType, TimeUnit rateUnit)
{
var meter = new MeterMetric(eventType, rateUnit);
Task.Factory.StartNew(async() =>
{
while (!meter._token.IsCancellationRequested)
{
await Task.Delay(Interval, meter._token.Token);
meter.Tick();
}
}, meter._token.Token);
return(meter);
}
public static MeterMetric New(string eventType, TimeUnit rateUnit)
{
var meter = new MeterMetric(eventType, rateUnit);
Task.Factory.StartNew(() =>
{
while (!meter._token.IsCancellationRequested)
{
Thread.Sleep(Interval);
meter.Tick();
}
}, meter._token.Token);
return meter;
}
private static MeterData CreateMeterData(MeterMetric metric)
{
return new MeterData
{
Count = metric.Count,
FifteenMinuteRate = Math.Round(metric.FifteenMinuteRate, 3),
FiveMinuteRate = Math.Round(metric.FiveMinuteRate, 3),
MeanRate = Math.Round(metric.MeanRate, 3),
OneMinuteRate = Math.Round(metric.OneMinuteRate, 3),
};
}
public static MeterMetric New(string eventType, TimeUnit rateUnit)
{
var meter = new MeterMetric(eventType, rateUnit);
meter._tickThread = _factory.New(
()=>
{
new Timer(s => meter.Tick(), null, _interval, _interval);
}
);
meter._tickThread.Start();
return meter;
}
public TimerMetricBase(TimeUnit durationUnit, TimeUnit rateUnit)
: this(durationUnit, rateUnit, MeterMetric.New("calls", rateUnit), new HistogramMetric(HistogramMetric.SampleType.Biased), true /* clear */)
{
}
public static MeterMetric New(string eventType, TimeUnit rateUnit)
{
var meter = new MeterMetric(eventType, rateUnit);
meter._token = Utils.StartCancellableTask(() =>
{
while (!meter._token.IsCancellationRequested)
{
Thread.Sleep(Interval);
meter.Tick();
}
});
return meter;
}
private void LogMeter(IRequest request, MetricName metricName, MeterMetric metric, long timestamp)
{
request.AddCounter(new DatadogCounter(_nameFormatter.Format(metricName.Name, _path), metric.Count, timestamp, _globalTags));
}
