AWS EC2实例每晚崩溃......仅运行Magento

I am running an AWS EC2 instance regular amazon linux flavor. It currently is running Magento 2, and only has 1gb ram as it is just a test server (free for a year!). It seems to be crashing every night, and I have to restart the instance to get SSH back up. checking var/log/messages shows the OOM killer is probably wiping out my ssh. For some reason, php and crond are showing up MANY MANY times. Can someone point me in the right debugging direction to narrow down where these PHP and Crond processes are coming from. Here is a snip from the messages log: I am running an AWS EC2 instance regular amazon