FunctionAppLogs

Log generated by Function Apps. It includes logs emitted by the Functions host and logs emitted by customer code. Use these logs to monitor application health, performance, and behavior.

Table attributes

Attribute	Value
Resource types	microsoft.web/sites
Categories	Azure Resources, Applications
Solutions	LogManagement
Basic log	No
Ingestion-time transformation	Yes
Sample Queries	Yes

Columns

Column	Type	Description
ActivityId	string	The activity ID that logged the message.
AppName	string	The Function application name.
_BilledSize	real	The record size in bytes
Category	string	The log category name.
EventId	int	The event ID.
EventName	string	The event name.
ExceptionDetails	string	The exception details. This includes the exception type, message, and stack trace.
ExceptionMessage	string	The exception message.
ExceptionType	string	The exception type (e.g., System.InvalidOperationException).
FunctionInvocationId	string	The invocation ID that logged the message.
FunctionName	string	The name of the function that logged the message.
HostInstanceId	string	The host instance ID.
HostVersion	string	The Functions host version.
_IsBillable	string	Specifies whether ingesting the data is billable. When _IsBillable is false ingestion isn't billed to your Azure account
Level	string	The log level. Valid values are Trace, Debug, Information, Warning, Error, or Critical.
LevelId	int	The integer value of the log level. Valid values are 0 (Trace), 1 (Debug), 2 (Information), 3 (Warning), 4 (Error), or 5 (Critical).
Location	string	The location of the server that processed the request (e.g., South Central US).
Message	string	The log message.
ProcessId	int	The process ID.
_ResourceId	string	A unique identifier for the resource that the record is associated with
RoleInstance	string	The role instance ID.
SourceSystem	string	The type of agent the event was collected by. For example, OpsManager for Windows agent, either direct connect or Operations Manager, Linux for all Linux agents, or Azure for Azure Diagnostics
_SubscriptionId	string	A unique identifier for the subscription that the record is associated with
TenantId	string	The Log Analytics workspace ID
TimeGenerated	datetime	The timestamp (UTC) of the log.
Type	string	The name of the table