subtable only accessible by core that created it - what about values in it

I am planning to restrict the number of http connections to a VS, something along the lines of https://devcentral.f5.com/wiki/irules.http_session_limit.ashx. However, to my knowledge, a subtable is only accessible to the core that created it, so the count variable stored core-1's subtable wouldn't be accessible to core-2, right?. Assuming that the connections are distributed more or lesse evenly among the cores, would I then have to calculate the static limit in the script to /?

Also, the mentioned script states "The cookie isn't set secure (So will work on HTTP, but you may want to change for an HTTPS only site)". Any hints as to how I would have to modify the cookie setting for a VS on https (doing SSL Offload)?