Cache miss stampedes

[dormando]

> You would not need tuning, and the rate of incoming requests is not a
> problem IMHO.
> 
> - If the rate is very low, one can expect that there won't be any
> stampede (unless the regeneration code is veeeeeeery slow, but this a
> code tuning problem, and not a caching one)
> - If the rate is moderate, it works fine
> - If the rate is very high, I still prefer to 1% of requests
> regenerating the key instead of 100% one minute later...

So, if you're generating an expire randomly, does that change anything 
at all?

Or do you mean it simply returns a cache miss randomly? I guess that'd work.

-Dormando