protected override void OnEventWritten(EventWrittenEventArgs eventData)
{
if (eventData.EventId == EventGcSuspendBegin)
{
_gcStart = eventData.TimeStamp;
}
else if (eventData.EventId == EventGcRestartEnd)
{
var start = _gcStart;
if (start != null)
{
GcPauseTime?.Invoke(eventData.TimeStamp - start.Value);
}
}
else if (eventData.EventId == EventGcHeapStats)
{
GcHeapStats?.Invoke(HeapStats.FromPayload(eventData.Payload));
}
else if (eventData.EventId == EventContentionStop)
{
Contention?.Invoke((double)eventData.Payload[2]);
}
else if (eventData.EventId == EventGcGlobalHeapHistory)
{
GcHeapHistory?.Invoke(HeapHistory.FromPayload(eventData.Payload));
}
}
protected override void OnEventWritten(EventWrittenEventArgs eventData)
{
if (_statsd == null)
{
// I know it sounds crazy at first, but because OnEventSourceCreated is called from the base constructor,
// and EnableEvents is called from OnEventSourceCreated, it's entirely possible that OnEventWritten
// gets called before the child constructor is called.
// In that case, just bail out.
return;
}
try
{
if (eventData.EventName == "EventCounters")
{
ExtractCounters(eventData.Payload);
}
else if (eventData.EventId == EventGcSuspendBegin)
{
_gcStart = eventData.TimeStamp;
}
else if (eventData.EventId == EventGcRestartEnd)
{
var start = _gcStart;
if (start != null)
{
_statsd.Timer(MetricsNames.GcPauseTime, (eventData.TimeStamp - start.Value).TotalMilliseconds);
Log.Debug("Sent the following metrics: {metrics}", MetricsNames.GcPauseTime);
}
}
else
{
if (eventData.EventId == EventGcHeapStats)
{
var stats = HeapStats.FromPayload(eventData.Payload);
_statsd.Gauge(MetricsNames.Gen0HeapSize, stats.Gen0Size);
_statsd.Gauge(MetricsNames.Gen1HeapSize, stats.Gen1Size);
_statsd.Gauge(MetricsNames.Gen2HeapSize, stats.Gen2Size);
_statsd.Gauge(MetricsNames.LohSize, stats.LohSize);
Log.Debug("Sent the following metrics: {metrics}", GcHeapStatsMetrics);
}
else if (eventData.EventId == EventContentionStop)
{
var durationInNanoseconds = (double)eventData.Payload[2];
_contentionTime.Time(durationInNanoseconds / 1_000_000);
Interlocked.Increment(ref _contentionCount);
}
else if (eventData.EventId == EventGcGlobalHeapHistory)
{
var heapHistory = HeapHistory.FromPayload(eventData.Payload);
if (heapHistory.MemoryLoad != null)
{
_statsd.Gauge(MetricsNames.GcMemoryLoad, heapHistory.MemoryLoad.Value);
}
_statsd.Increment(GcCountMetricNames[heapHistory.Generation], 1, tags: heapHistory.Compacting ? CompactingGcTags : NotCompactingGcTags);
Log.Debug("Sent the following metrics: {metrics}", GcGlobalHeapMetrics);
}
}
}
catch (Exception ex)
{
Log.Warning <int, string>(ex, "Error while processing event {EventId} {EventName}", eventData.EventId, eventData.EventName);
}
}