CoderLyn's developer journey

dotnet: Azure analytics

Lyn Tee's photo
Lyn Tee
·

2 min read

  • AppTraces: all the logs, such as warnings, information and error logs

  • AppMetrics: telemetry metrics

  • AppEvents: telemetry events

Which analytics to use?

  • Logs are much more expensive to store compared to telemetry metrics and events

  • Have a think about whether telemetry is good enough

  • Key questions to think through

    • Why do I want to analyse this?

    • How will I know if it's successful?

    • How will I know if it's failed? How will I debug if it's failed?

    • How many times will this be triggered?

You can configure the telemetry to sample certain types

  • Telemetry metrics are not listed as an option for sampling. Shahn says these are never sampled, as sampling would render the metric useless, given it is a count

  • Types

    • Event: telemetry event

    • Exception: error logs and other exceptions

    • Trace: all logs, such as warning and information logs

        /// <summary>
        /// Adds <see cref="SamplingTelemetryProcessor"/> to the given<see cref="TelemetryProcessorChainBuilder" />.
        /// </summary>
        /// <param name="builder">Instance of <see cref="TelemetryProcessorChainBuilder"/>.</param>
        /// <param name="samplingPercentage">Sampling Percentage to configure.</param>     
        /// <param name="excludedTypes">Semicolon separated list of types that should not be sampled. Allowed type names: Dependency, Event, Exception, PageView, Request, Trace.</param>   
        /// <param name="includedTypes">Semicolon separated list of types that should be sampled. All types are sampled when left empty. Allowed type names: Dependency, Event, Exception, PageView, Request, Trace.</param> 
        /// <return>Same instance of <see cref="TelemetryProcessorChainBuilder"/>.</return>
        public static TelemetryProcessorChainBuilder UseSampling(this TelemetryProcessorChainBuilder builder, double samplingPercentage, string excludedTypes = null, string includedTypes = null)
dotnet