What is Asynchronous Adaptive Refresh (AAR) ?


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Solution

Overview

Asynchronous Adaptive Refresh (AAR) allows the ProxySG to keep cached objects as fresh as possible, thus reducing response times. The AAR algorithm allows HTTP proxy to manage cached objects based on their rate of change and popularity: an object that changes frequently and/or is requested frequently will be more eligible for asynchronous refresh compared to an object with a lower rate of change and/or popularity.

AAR produces estimated expiry times for type M objects (objects that contain the Last Modified HTTP Header) based on observations of actual changes - that is, the cache does not solely rely on what the origin server may have indicated with respect to last modified time.

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Resolution
Workaround
Additional Information
Bug Number
InQuira Doc IdFAQ419
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First Published      10/01/2014
Last Modified      10/01/2014
Last Published      10/01/2014
Article Audience
Product      ProxySG
Software      SGOS 4, SGOS 5
Topic      Performance
Article Number      000015160
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