ResponseHeadersPolicyServerTimingHeadersConfig
A configuration for enabling the Server-Timing
header in HTTP responses
sent from CloudFront. CloudFront adds this header to HTTP responses that it sends in response to
requests that match a cache behavior that's associated with this response headers
policy.
You can use the Server-Timing
header to view metrics that can help you
gain insights about the behavior and performance of CloudFront. For example, you can see which
cache layer served a cache hit, or the first byte latency from the origin when there was
a cache miss. You can use the metrics in the Server-Timing
header to
troubleshoot issues or test the efficiency of your CloudFront configuration. For more
information, see Server-Timing header in the
Amazon CloudFront Developer Guide.
Contents
- Enabled
-
A Boolean that determines whether CloudFront adds the
Server-Timing
header to HTTP responses that it sends in response to requests that match a cache behavior that's associated with this response headers policy.Type: Boolean
Required: Yes
- SamplingRate
-
A number 0–100 (inclusive) that specifies the percentage of responses that you want CloudFront to add the
Server-Timing
header to. When you set the sampling rate to 100, CloudFront adds theServer-Timing
header to the HTTP response for every request that matches the cache behavior that this response headers policy is attached to. When you set it to 50, CloudFront adds the header to 50% of the responses for requests that match the cache behavior. You can set the sampling rate to any number 0–100 with up to four decimal places.Type: Double
Valid Range: Minimum value of 0.0. Maximum value of 100.0.
Required: No
See Also
For more information about using this API in one of the language-specific Amazon SDKs, see the following: