what values should I use for responses-per-second and window in my rate-limit clause?

[Red Cricket]

I am having trouble determining what values I should set my rate-limit to.
The only example I have seen is this ...


        rate-limit {
                responses-per-second 5;
                window 5;
        };

... is that too tight? Can it cause problems for my clients?  This is
suppose to help defeat amplification attacks right?

Thanks!
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