I don't think it's hc execution time relatve to interval, it's hc
execution time relative to AP_WD_TM_SLICE. If it's much more than
AP_WD_TM_SLICE they'll stack up while one is running.
For a 1 second response you could queue up 10 in a second even if you
only have an interval of as minute or hour.
Hmm... let me do some testing here... if that's the case, then it's borked