I'm increasing the RAM of the machine from 8gb to 16gb (Thanks to Gaiwan for footing the bill bananadance), then going to play around a bit with the jvm memory config options. Hopefully this should solve most of the issues for the time being 🙂
Done!! Increased main app memory limit from 1.5/2.5g to 3/5g, going to check if that works or not. If it doesn't will try increasing it even more Have not changed datomic/memcached settings yet. Lets see how it goes!!