Trace telemetry: Application Insights data model

Trace telemetry (in Application Insights) represents printf style trace statements that are text-searched. Log4Net, NLog, and other text-based log file entries are translated into instances of this type. The trace does not have measurements as an extensibility.


Trace message.

Max length: 32768 characters

Severity level

Trace severity level. Value can be Verbose, Information, Warning, Error, Critical.

Custom properties

Name-value collection of custom properties. This collection is used to extend standard telemetry with the custom dimensions. Examples are deployment slot that produced telemetry or telemetry-item specific property like order number.

Max key length: 150 Max value length: 8192

Next steps