On Jul 31, 2007, at 13:17, Kenner Stross wrote:
I've been thinking about the question of cache miss stampedes and came up with an idea this morning that I wanted to run by the group. What if, for those items that were a real "cache miss stampede" risk (i.e., very-high request rate and expensive to recover from db), you randomly refetched from the db regardless of whether it was in the cache? [....]
It really depends on your application. Sometimes doing what you suggest works well, but often then figuring out how often to refetch is as much or more trouble as just having an out-of-band thing update the cache - and almost always much much less efficient. If you have to do extra coding to make it work anyway, why make the user wait for it to execute?
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