mlibbey opened a new issue, #12252:
URL: https://github.com/apache/trafficserver/issues/12252

   Our proxy.config.http.cache.max_stale_age is currently a number of seconds. 
The shorter the ttl, the larger the percentage of potential stale time. For 
instance, the default 7 day max_stale_age would be 700% of a 1 day ttl; and 
obviously grows the shorter the ttl. Conversely, the default is only 25% of a 1 
month ttl and 2% of a 1 year percent. It's much safer to allow an object with 
1yr ttl to be served an extra 2% than to allow an 1hr ttl object to be served 
for so long.
   
   We should really have a percentage setting instead-- for instance setting 
stale to be 25% would allow a 1hr ttl object to be served stale for an extra 15 
min, whereas a 1 month ttl object would be allowed to be served for an extra 
week.


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