All User shares missing after starting a VM(reboot fixes it)

I've had this issue for weeks now, whenever I start a VM that requires a lot of RAM, my shares cease to exist and the only fix is to reboot the entire server every single time which is once a day. I have run some memory tests via the Live Memory Tester Plugin but no issues seem to be logged when completing the test with the array spun down and using all except 500mb of RAM. I'm thinking about getting a new set of RAM to see if that does the trick, but I'm not so sure that it will help. Can anyone recommend anything else to test and help nail down what is going on?