private static void updateUsedMemoryCounter(PdhCounterPathElement pathElement)
{
MEMORYSTATUSEX memStatus = new MEMORYSTATUSEX();
if (Interop.Interop.GlobalMemoryStatusEx(memStatus))
{
ulong installedMemory = memStatus.ullTotalPhys / 1024 / 1024;
PerformanceCounter usedMemCounter = pathElement.InstanceName == null ?
new PerformanceCounter(pathElement.ObjectName, pathElement.CounterName, true) :
new PerformanceCounter(pathElement.ObjectName, pathElement.CounterName, pathElement.InstanceName, true);
var itr = _handler.GetPathElements(new List<string>() { "\\Memory\\Available MBytes" });
var pe = itr.ElementAt(0);
PerformanceCounter availMem = pathElement.InstanceName == null ?
new PerformanceCounter(pe.ObjectName, pe.CounterName, true) :
new PerformanceCounter(pe.ObjectName, pe.CounterName, pe.InstanceName, true);
usedMemCounter.ReadOnly = false;
usedMemCounter.RawValue = (long)(installedMemory - Convert.ToUInt64(availMem.NextValue()));
usedMemCounter.Close();
}
}
private MetricInfo RegisterMetric(PdhCounterPathElement pathElement, IDictionary<String, MetricInfo> existingMetrics)
{
string contextName = CleanName(pathElement.ObjectName);
string metricName = CleanName(pathElement.CounterName);
string instanceName = CleanName(pathElement.InstanceName);
MetricTags tags = default(MetricTags);
if (instanceName != null)
{
tags = "instance=" + instanceName;
}
string keyName = MetricInfo.TagName(contextName + metricName, tags);
MetricInfo mInfo;
if (existingMetrics.TryGetValue(keyName, out mInfo))
{
existingMetrics.Remove(keyName);
return mInfo;
}
PerfCounterGauge pcGauge = new PerfCounterGauge(pathElement.ObjectName, pathElement.CounterName, pathElement.InstanceName);
TimerMetric timer = null;
PerformanceCounterType type = pcGauge.performanceCounter.CounterType;
switch (type)
{
//these types of counters are not usable
case PerformanceCounterType.AverageBase:
case PerformanceCounterType.CounterMultiBase:
case PerformanceCounterType.RawBase:
case PerformanceCounterType.SampleBase:
_log.Error(String.Format("Don't know how to handle metric of type {0} for {1}", type.ToString(), metricName));
return null;
//timers
case PerformanceCounterType.AverageTimer32:
case PerformanceCounterType.ElapsedTime:
timer = new TimerMetric(SamplingType.FavourRecent);
break;
}
mInfo = new MetricInfo(contextName, metricName, tags, timer, pcGauge);
if (mInfo.Timer != null)
{
_timers[keyName] = mInfo;
}
return mInfo;
}
