I am suddenly getting regular out of memory issues on my server.  This has not been a problem until the last week or so and it is now happening every day or two as reported by Fix Common Problems.   I have 16GB of RAM and the Dashboard shows 45% used but Dynamix System Stats plugin shows <1GB free and 4GB cached so I don't know why they don't agree.   I don't have any VMs running but I do have a handful of docker containers (the biggest one being Crashplan using ~4GB RAM a