Process to get Performance data for the managed entity c#
Could someone please describe the process for pulling data from the API performance? The documentation seems a bit muddled.
Qustions:
Should you create a custom interval perf or you can use the default settings?
If I have a performanceManager MOR and a hostSystem MOR what methods should I call on the PerformanceManger object to retrieve the performance counters on the managed entity? I'm trying to get ready time % of a host. Looks like I need to use the QueryAvailablePerfMetric method to draw the MetricID and then use the QueryPerf to shoot the actual static...
Any help is appreciated.
VirtualFisk
You can use available perfIntervals to extract data.
You have reason to extract performance data, you must first call QueryAvailablePerfMetric to get metricIds and then pass them in the appeal of QueryPerf.
Also to check whether or not real-time data are available on the entity you must first call QueryPerfProviderSummary on entity and check the PerfProviderSummary currentSupported property. If she defined as true, real-time data are available and you can pass PerfProviderSummary refreshRate as intervalID in your QueryAvailablePerfMetric call and still pass this refreshRate as intervalID PerfQuerySpec for QueryPerf appeal.
Please see following code snippet to retrieve data for the managed entity HostSystem (hostMoRef), you can replace it with a managed object of an entity reference
int counterID;
int key;
String group;
String name;
String rollup;ManagedObjectReference pmRef = _sic.perfManager;
PerfCounterInfo[] cInfo = (PerfCounterInfo[])getObjectProperty(pmRef, "perfCounter");Hashtable PerfByID = new Hashtable();
for (int i = 0; i < cInfo.Length; i++)
{
key = cInfo[i].key;
group = cInfo[i].groupInfo.key;
name = cInfo[i].nameInfo.key;
rollup = cInfo[i].rollupType.ToString();
Console.WriteLine("ID: " + key + " group: " + group + "." + name + "." + rollup);
PerfByID.Add(key, group + "." + name + "." + rollup);
}
Console.WriteLine("\n---------------------------------------------");
Console.WriteLine("Entity: " + hostMoRef.Value);
PerfProviderSummary perfSum = _service.QueryPerfProviderSummary(pmRef, hostMoRef);
Console.WriteLine("Refresh Rate" + perfSum.refreshRate + "\nCurrentSupported :"
+ perfSum.currentSupported + "\nisSummarySupported :" + perfSum.summarySupported);Console.WriteLine("Fetching Perf Metric Ids");
DateTime curTime = _service.CurrentTime(_svcRef);
DateTime beginTime = curTime.Subtract(new TimeSpan(1, 0, 0));
DateTime endTime = curTime;
int intervalID;
if (perfSum.refreshRate < 0) {
intervalID = 300;
} else {
intervalID = perfSum.refreshRate;
}
intervalID = 300;
PerfMetricId[] Ids = _service.QueryAvailablePerfMetric(pmRef, hostMoRef, beginTime, false, endTime, false, intervalID, true);if (Ids != null && Ids.Length > 0)
{
Console.WriteLine("Ids fetched from QueryAvailablePerfMetric API are:");
for (int k = 0; k < Ids.Length; k++) {
Console.WriteLine("ID is: " + Ids[k].counterId + " Instance is: " + Ids[k].instance + "Name is: " + PerfByID[Ids[http://k].counterId|http://k].counterId]);
}PerfQuerySpec qSpec = new PerfQuerySpec();
qSpec.entity = hostMoRef;
qSpec.metricId = Ids;
qSpec.format = "csv";
qSpec.intervalId = intervalID;
qSpec.startTime = beginTime;
qSpec.startTimeSpecified = true;
qSpec.endTime = endTime;
qSpec.endTimeSpecified = true;
qSpec.maxSample = 1;
qSpec.maxSampleSpecified = true;PerfQuerySpec[] qSpecs = new PerfQuerySpec[] { qSpec };
if (hostMoRef != null)
{
PerfEntityMetricBase[] perfEntity = null;
perfEntity = _service.QueryPerf(pmRef, qSpecs);if (perfEntity != null && perfEntity.Length > 0)
{
for (int i = 0; i < perfEntity.Length; i++)
{
PerfEntityMetricCSV pms = (PerfEntityMetricCSV)perfEntity[i];
PerfMetricSeriesCSV[] vals = pms.value;
if (vals != null)
{
Console.WriteLine("Perf Counters fetched");
for (int vi = 0; vi < vals.Length; vi++)
{
PerfMetricSeriesCSV pmCSV = vals[vi];
if (PerfByID[vals[http://vi].id.counterId|http://vi].id.counterId].ToString().StartsWith("mem.vmmemctl")) {
Console.WriteLine("CounterId: " + vals[vi].id.counterId + " Name: " + PerfByID[vals[http://vi].id.counterId|http://vi].id.counterId] + " Instance: " + vals[vi].id.instance + " ----- ");
counterID = vals[vi].id.counterId;
//Console.WriteLine("Value in Map: " + PerfByID.get(counterID));
Console.WriteLine("-------- Value : " + pmCSV.value);
}
}
}
}
}
else
{
Console.WriteLine("Performance statistics not available for this entity!");
}
}
}
else
{
Console.WriteLine("Perf Metrics not fetched");
}
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