[squid-users] None Existing File; Repeating Request Timeout

Hi All Im New to squid..

I've scanned through squid 2.6 & 3.0 Manual and Definitive guide, but
i still can't find information about this question..

Is it possible to have a request_timeout when the request file doesn't
exist on the squid cache and peer server?
e.g if client requestionwww.example.com/dontexist.html�and then
receives 404 http
then the client will have to wait until request_timeout 30 seconds to
able to request
www.example.com/dontexist.html�again
could�this be done? is there such setting/configuration?

Thank you very much in advance

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Thanks,
Joe