Azure/azure-sdk-for-net Azure.Monitor.OpenTelemetry.AspNetCore_1.4.0-beta.1

on GitHub

1.4.0-beta.1 (2025-10-21)

Features Added

• Added support for configuring sampling via OpenTelemetry environment
  variables:
  • OTEL_TRACES_SAMPLER (supported values: microsoft.rate_limited,
    microsoft.fixed_percentage).
  • OTEL_TRACES_SAMPLER_ARG (rate limit in traces/sec for
    microsoft.rate_limited, sampling ratio 0.0 - 1.0 for
    microsoft.fixed_percentage).
    (#52720)
• Added handling of stable database client span semantic conventions
  (#53050)
• Added new performance monitoring capabilities to help track application health and resource usage. Newly added metrics:
  • \.NET CLR Exceptions(??APP_CLR_PROC??)\# of Exceps Thrown / sec
  • \ASP.NET Applications(??APP_W3SVC_PROC??)\Requests/Sec;
  • \Process(??APP_WIN32_PROC??)\% Processor Time"
  • \Process(??APP_WIN32_PROC??)\% Processor Time Normalized
  • \Process(??APP_WIN32_PROC??)\Private Bytes
    (#52705)
• Added built-in monitoring to track SDK performance and health. Emitted metrics:
  • preview.item.success.count
  • preview.item.dropped.count
  • preview.item.retry.count
    (#53010)
• Add enduser.pseudo.id as ai.user.id
  (#52722)
• Add ai.location.ip mapping for all telemetry types (#52211)