Example telemetry event - Amazon CloudWatch

Example telemetry event

Each invocation of a Lambda function that has Lambda Insights enabled writes a single log event to the /aws/lambda-insights log group. Each log event contains metrics in embedded metric format. For more information about embedded metric format, see Ingesting high-cardinality logs and generating metrics with CloudWatch embedded metric format.

To analyze these log events, you can use the following methods:

The following is an example of a Lambda Insights log event with embedded metric format.

{ "_aws": { "Timestamp": 1605034324256, "CloudWatchMetrics": [ { "Namespace": "LambdaInsights", "Dimensions": [ [ "function_name" ], [ "function_name", "version" ] ], "Metrics": [ { "Name": "memory_utilization", "Unit": "Percent" }, { "Name": "total_memory", "Unit": "Megabytes" }, { "Name": "used_memory_max", "Unit": "Megabytes" }, { "Name": "cpu_total_time", "Unit": "Milliseconds" }, { "Name": "tx_bytes", "Unit": "Bytes" }, { "Name": "rx_bytes", "Unit": "Bytes" }, { "Name": "total_network", "Unit": "Bytes" }, { "Name": "init_duration", "Unit": "Milliseconds" } ] } ], "LambdaInsights": { "ShareTelemetry": true } }, "event_type": "performance", "function_name": "cpu-intensive", "version": "Blue", "request_id": "12345678-8bcc-42f7-b1de-123456789012", "trace_id": "1-5faae118-12345678901234567890", "duration": 45191, "billed_duration": 45200, "billed_mb_ms": 11571200, "cold_start": true, "init_duration": 130, "tmp_free": 538329088, "tmp_max": 551346176, "threads_max": 11, "used_memory_max": 63, "total_memory": 256, "memory_utilization": 24, "cpu_user_time": 6640, "cpu_system_time": 50, "cpu_total_time": 6690, "fd_use": 416, "fd_max": 32642, "tx_bytes": 4434, "rx_bytes": 6911, "timeout": true, "shutdown_reason": "Timeout", "total_network": 11345, "agent_version": "1.0.72.0", "agent_memory_avg": 10, "agent_memory_max": 10 }