Limit of concurrent connections

[ED]

During heavy load on your firewall busiest periods you can get connection failures I read. As mentioned in other threads on this community you can run this command to see if your firewall reached the limit:

fw tab -t connections -s

But default on new installations og Gaia it's not configured a limit nmber of concurrent connections. On your firewall object in SmartConsole it's set to automatically:

So my question is what is the limit actually set to then? My gateway has 16GB of RAM. Output of the above command:

I see that since boot up that the peak was at 21394 concurrent connections. But since I actually don't know the limit and if this is low or high what do I get out of this command? How do I know if new connections were dropped (not from firewall policy) because firewall could not keep track of the new connection?