Correct Firewall Connection Tracking?

I am asking for advices in how to configure the connection tracking setting on the mikrotik firewall, I am noticing that since the upgrade to v7 I am receiving the message " There are too many records to show them all" and my free memory is slowly but surely going up during the day, it used to take 20 MiB to run a whole day, now it is growing until it fails and reboots itself in less than 2 days, the model I use has 1568.0 MiB total memory.