Edge for Private Cloud v. 4.17.01
To prevent memory issues in Edge, message payload size on the Router and Message Processor is
  restricted to 10MB. Exceeding those sizes results in
  a protocol.http.TooBigBody error.
Use the following properties to change the limits on the Router, Message Processor, or both. Both properties have a default value of "10m" corresponding to 10MB:
- conf_http_HTTPRequest.body.buffer.limit
- conf_http_HTTPResponse.body.buffer.limit
To set these properties:
- Open the router.properties file
    or message-processor.properties
    file in an editor. If the file does not exist, create it::
 > vi /opt/apigee/customer/application/router.properties
 
 or:
 > vi /opt/apigee/customer/application/message-processor.properties
- Set the properties as desired:
 conf_http_HTTPRequest.body.buffer.limit=15m
 conf_http_HTTPResponse.body.buffer.limit=15m
- Save your changes.
- Make sure the properties file is owned by the 'apigee' user:
 > chown apigee:apigee /opt/apigee/customer/application/router.properties
 or:
 > chown apigee:apigee /opt/apigee/customer/application/message-processor.properties
- Restart the Edge component:
 > /opt/apigee/apigee-service/bin/apigee-service edge-router restart
 
 or:
 > /opt/apigee/apigee-service/bin/apigee-service edge-message-processor restart