[cacher] Frequency of Release checks too high?

[xipmix]

The default is 15 seconds. My concern is, if this utility comes into widespread use, won't it put a large load on the upstream servers? The whole point of having an apt-cache is to reduce the load on the upstream servers.
Can you say what the rationale for 15s was? What would be the downsides of setting this to, say 3601s?

[ymmt2005]

The implication in the default 15 seconds was that go-apt-cacher is supposedly used
more often for (private) repositories with frequent updates.

That said, I agree the current default is a bit too short for public repositories.
I think changing the default to 600 seconds is safer.