DNS Asynchronous Prefresh

With DNS Prefresh enabled, the edge servers refresh your origin DNS record independent from receiving a request from end-users, and prior to the expiration of your origin DNS resolution's TTL.

Contact ​Akamai​ Professional Services for help configuring this behavior.


The DNS name might fail to prefresh, as there is a limit on the number of prefreshes the ​Akamai​ server can perform per second. This limit might be reached due to the large number of names the server is trying to maintain (origins, maps, etc.).

Features and options


What it does


Enables or disables the behavior.


Set the delay before initiating an asynchronous refresh of the DNS resolution.


Set the timeout for prefreshing the DNS entries if there have been no requests to that domain name.

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