Quotas

You can request a CloudFront quota increase by using the following options:

• You can use the Service Quotas console or the AWS Command Line Interface. For more information, see the following topics:

  • Requesting a quota increase in the Service Quotas User Guide

  • request-service-quota-increase in the AWS CLI Command Reference

• If a CloudFront quota isn't available in Service Quotas, use the AWS Support Center Console to create a service quota increase case.

CloudFront is subject to the following quotas.

General quotas

Entity	Default quota
Data transfer rate per distribution	150 Gbps Request a higher quota
Requests per second per distribution	250,000 Request a higher quota
Tags that can be added to a distribution	50 Request a higher quota
Files that you can serve per distribution	No quota
Maximum length of a request or an origin response, including headers and query strings, but not including the body content	20,480 bytes
Maximum length of a URL	8,192 bytes

General quotas on distributions

Entity	Default quota
Alternate domain names (CNAMEs) per distribution For more information, see Use custom URLs by adding alternate domain names (CNAMEs).	100 Request a higher quota
Cache behaviors per distribution	25 Request a higher quota
Connection attempts per origin For more information, see Connection attempts.	1-3
Connection timeout per origin For more information, see Connection timeout.	1-10 seconds
Distributions per AWS account For more information, see Create a distribution.	200 Request a higher quota
Distributions per origin access control	100 Request a higher quota
Distributions within chain of requests to origin endpoint We don't recommend placing one distribution in front of another. Exceeding this quota results in a 403 error.	2
File compression: range of file sizes that CloudFront compresses For more information, see Serve compressed files.	1,000 to 10,000,000 bytes
Keep-alive timeout per origin For more information, see Keep-alive timeout (custom origins only).	1-60 seconds Request a higher quota
Maximum cacheable file size per HTTP GET response. Only the responses for an HTTP GET are cached. Responses for POST or PUT are not cached.	50 GB
Origin access controls per AWS account	100
Origin access identities per AWS account	100 Request a higher quota
Origins per distribution	25 Request a higher quota
Origin groups per distribution	10 Request a higher quota
Response timeout per origin For more information, see Response timeout (custom origins only).	1-60 seconds Request a higher quota
Staging distributions per AWS account For more information, see Use CloudFront continuous deployment to safely test CDN configuration changes.	20 Request a higher quota

General quotas on policies

Entity	Default quota
Cache policies per AWS account	20 Request a higher quota
Distributions associated with the same cache policy	100
Query strings per cache policy	10 Request a higher quota
Headers per cache policy	10 Request a higher quota
Cookies per cache policy	10 Request a higher quota
Total combined length of all query string, header, and cookie names in a cache policy	1024
Origin request policies per AWS account	20 Request a higher quota
Distributions associated with the same origin request policy	100
Query strings per origin request policy	10 Request a higher quota
Headers per origin request policy	10 Request a higher quota
Cookies per origin request policy	10 Request a higher quota
Total combined length of all query string, header, and cookie names in an origin request policy	1024
Response headers policies per AWS account	20 Request a higher quota
Distributions associated with the same response headers policy	100 Request a higher quota
Custom headers per response headers policy	10 Request a higher quota
Continuous deployment policies per AWS account	20 Request a higher quota

Quotas on CloudFront Functions

Entity	Default quota
Functions per AWS account	100
Maximum function size This quota isn't adjustable. To store additional data for your CloudFront Functions, create a key value store and add your key-value pairs. For more information, see Amazon CloudFront KeyValueStore.	10 KB
Maximum function memory	2 MB
Distributions associated with the same function	100

In addition to these quotas, there are some other restrictions when using CloudFront Functions. For more information, see Restrictions on CloudFront Functions.

Quotas on key value stores

Entity	Default quota
Maximum size of a key in a key-value pair	512 Bytes
Maximum size of the value in a key-value pair	1 KB
Maximum key values pairs that you can update in a single API request	50 keys or 3 MB payload, whichever is reached first
Maximum size of an individual key value store	5 MB
Maximum number of functions that a single key value store can be associated with	10
Maximum number of key value stores per function	1
Maximum number of key value stores per account	50 Request a higher quota

Quotas on Lambda@Edge

General quotas

Entity	Default quota
Distributions per AWS account that can have Lambda@Edge functions	500 Request a higher quota
Lambda@Edge functions per distribution	100 Request a higher quota
Concurrent executions Note Lambda manages the concurrency quotas for Lambda@Edge. All Lambda functions in the AWS Region share this quota. For more information, see Function scaling in the AWS Lambda Developer Guide.	1,000 (in each AWS Region) Request a higher quota
Distributions associated with the same function	500
Maximum compressed size of a Lambda function and any included libraries	50 MB
Lambda@Edge requests per second (each supported AWS Region)	10,000

Quotas that differ by event type

Entity	Viewer request and viewer response events	Origin request and origin response events
Function memory size	128 MB	Same as Lambda quotas
Function timeout. The function can make network calls to resources such as Amazon S3 buckets, DynamoDB tables, or Amazon EC2 instances in AWS Regions.	5 seconds	30 seconds
Size of a response that is generated by a Lambda function, including headers and body	40 KB	1 MB

In addition to these quotas, there are some other restrictions when using Lambda@Edge functions. For more information, see Restrictions on Lambda@Edge.

Quotas on SSL certificates

Entity	Default quota
SSL certificates per AWS account when serving HTTPS requests using dedicated IP addresses (no quota when serving HTTPS requests using SNI) For more information, see Use HTTPS with CloudFront.	2 Request a higher quota
SSL certificates that can be associated with a CloudFront distribution	1

If your SSL certificate is specifically for HTTPS communication between viewers and CloudFront, and if you used AWS Certificate Manager (ACM) or the IAM certificate store to provision or import your certificate, additional quotas apply. For more information, see Quotas on using SSL/TLS certificates with CloudFront (HTTPS between viewers and CloudFront only).

There are also quotas on the number of SSL certificates that you can import into AWS Certificate Manager (ACM) or upload to AWS Identity and Access Management (IAM). For more information, see Increase the quotas for SSL/TLS certificates.

Quotas on invalidations

Entity	Default quota
File invalidation: maximum number of files allowed in active invalidation requests, excluding wildcard invalidations For more information, see Invalidate files to remove content.	3,000
File invalidation: maximum number of active wildcard invalidations allowed	15
File invalidation: maximum number of files that one wildcard invalidation can process	No quota

Quotas on key groups

Entity	Default quota
Public keys in a single key group	5 Request a higher quota
Key groups associated with a single cache behavior	4 Request a higher quota
Key groups per AWS account	10 Request a higher quota
Distributions associated with a single key group	100 Request a higher quota

Quotas on WebSocket connections

Entity	Default quota
Origin response timeout (idle timeout)	10 minutes If CloudFront hasn't detected any bytes sent from the origin to the client within the past 10 minutes, the connection is assumed to be idle and is closed.

Quotas on field-level encryption

Entity	Default quota
Maximum length of a field to encrypt For more information, see Use field-level encryption to help protect sensitive data.	16 KB
Maximum number of fields in a request body when field-level encryption is configured	10
Maximum length of a request body when field-level encryption is configured	1 MB
Maximum number of field-level encryption configurations that can be associated with one AWS account	10
Maximum number of field-level encryption profiles that can be associated with one AWS account	10
Maximum number of public keys that can be added to one AWS account	10
Maximum number of fields to encrypt that can be specified in one profile	10
Maximum number of CloudFront distributions that can be associated with a field-level encryption configuration	20
Maximum number of query argument profile mappings that can be included in a field-level encryption configuration	5

Quotas on cookies (legacy cache settings)

These quotas apply to CloudFront's legacy cache settings. We recommend using a cache policy or origin request policy instead of the legacy settings.

Entity	Default quota
Cookies per cache behavior For more information, see Cache content based on cookies.	10 Request a higher quota
Total number of bytes in cookie names (doesn't apply if you configure CloudFront to forward all cookies to the origin)	512 minus the number of cookies

Quotas on query strings (legacy cache settings)

These quotas apply to CloudFront's legacy cache settings. We recommend using a cache policy or origin request policy instead of the legacy settings.

Entity	Default quota
Maximum number of characters in a query string	128 characters
Maximum number of characters total for all query strings in the same parameter	512 characters
Query strings per cache behavior For more information, see Cache content based on query string parameters.	10 Request a higher quota

Quotas on headers

Entity	Default quota
Headers per cache behavior (legacy cache settings) For more information, see Cache content based on request headers.	10 Request a higher quota
Custom headers: maximum number of custom headers that you can configure CloudFront to add to origin requests For more information, see Add custom headers to origin requests.	10 Request a higher quota
Custom headers: maximum number of custom headers that you can add to a response headers policy	10 Request a higher quota
Custom headers: maximum length of a header name	256 characters
Custom headers: maximum length of a header value	1,783 characters
Custom headers: maximum length of all header values and names combined	10,240 characters
Maximum length of the Content-Security-Policy header value	1,783 characters Request a higher quota
Maximum length of a CORS (Access-Control-Allow-Origin) header value	1,783 characters Request a higher quota

Related information

For more information, see Amazon CloudFront endpoints and quotas in the AWS General Reference.