Amazon CloudWatch Logs now supports log events up to 1 MB in size, a 4x increase from the previous 256 KB limit. This enhancement applies to the CloudWatch Logs PutLogEvents API and OpenTelemetry Protocol (OTLP) endpoint.
Customers…
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https://aws.amazon.com/about-aws/whats-new/2025/04/amazon-cloudwatch-logs-increases-log-event-size-1-mb/