Cloud Trace API Limits Expanded for Spans and Attributes
Cloud Trace has increased several API limits, including maximum attributes per span (now 1,024), attribute value size (65,532 bytes), and events per span (256). These expanded limits provide greater flexibility for developers capturing detailed tracing information. The changes ensure consistency with the Telemetry API, which implements the OpenTelemetry Protocol (OTLP).
Features (1) ›
- Cloud Trace
The following limits associated with the Cloud Trace API, cloudtrace.googleapis.com , have increased: Maximum attributes per span: 1,024 Maximum attribute value size: 65,532 bytes Maximum attribute key size: 512 bytes Maximum span name length: 1,024 bytes Maximum events per span: 256 The new limits are consistent with those supported by the Telemetry API, which implements the OpenTelemetry Protocol (OTLP) . For more information, see Cloud Trace API quotas and limits .
https://docs.cloud.google.com/release-notes#August_17_2026
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