Deprecate PerformanceCounter type

[SergeyKanzhelev]

We plan to deprecate PerformanceCounter type in favor of custom metrics.

Proposed conversion is similar to what we use for custom metrics today. When we receive PerformanceCounter (pc) we save it as a Metric (m):

m.Name = pc.CategoryName + “ - “ + pc.CounterName
m.Value = pc.Value
m.Count = 1
m.Properties[“CounterInstanceName”] = pc.InstanceName
foreach (prop in pc.Properties)
    m.Properties[prop.Name] = prop.Value

There is a multi-step plan to accomplish this:

1. Overlap period when performance counters are forked as metrics
2. After a week of overlap period UI will switch to use metrics. Historical data for performance counters should be available in metrics explorer

FAQ

Will it affect existing limits?

• Yes, it will use 9 of 200 of custom metrics limit for standard counters
• Yes, it will use 1 of 200 of custom properties limit for standard counters

Will there be a data loss?

• We do not plan any data loss. However in 1 week month old data will not be displayed on Servers blade
• More than 1 month old performance counters data will not be available