/// <summary>
/// Snapshot cache metrics
/// </summary>
/// <param name="pagesLoaded"></param>
public static void RecordCacheMetric(int pagesLoaded)
{
SampledMetricDefinition pageMetricDefinition;
//since sampled metrics have only one value per metric, we have to create multiple metrics (one for every value)
if (SampledMetricDefinition.TryGetValue("GibraltarSample", "Database.Engine", "Cache Pages", out pageMetricDefinition) == false)
{
//doesn't exist yet - add it in all of its glory. This call is MT safe - we get back the object in cache even if registered on another thread.
pageMetricDefinition = SampledMetricDefinition.Register("GibraltarSample", "Database.Engine", "cachePages", SamplingType.RawCount, "Pages", "Cache Pages", "The number of pages in the cache");
}
//now that we know we have the definitions, make sure we've defined the metric instances.
SampledMetric pageMetric = SampledMetric.Register(pageMetricDefinition, null);
//now go ahead and write those samples....
pageMetric.WriteSample(pagesLoaded);
//Continue for our second metric.
SampledMetricDefinition sizeMetricDefinition;
if (SampledMetricDefinition.TryGetValue("GibraltarSample", "Database.Engine", "Cache Size", out sizeMetricDefinition) == false)
{
//doesn't exist yet - add it in all of its glory This call is MT safe - we get back the object in cache even if registered on another thread.
sizeMetricDefinition = SampledMetricDefinition.Register("GibraltarSample", "Database.Engine", "cacheSize", SamplingType.RawCount, "Bytes", "Cache Size", "The number of bytes used by pages in the cache");
}
SampledMetric sizeMetric = SampledMetric.Register(sizeMetricDefinition, null);
sizeMetric.WriteSample(pagesLoaded * 8196);
}
public void TestEventAttributeReflection()
{
SampledMetric.Register(typeof(UserSampledObject));
UserSampledObject sampledObject = new UserSampledObject(25, 100);
SampledMetricDefinition.Write(sampledObject);
SampledMetricDefinition sampledMetricDefinition;
Assert.IsTrue(SampledMetricDefinition.TryGetValue(typeof(UserSampledObject), "IncrementalCount", out sampledMetricDefinition));
sampledObject.SetValue(35, 90);
sampledMetricDefinition.WriteSample(sampledObject);
}
