It is working great until it crashes which is likely due to the memory thing. Do you have a link to previous versions? I think the 6.2.2 was working correctly, maybe the one prior to that I am not sure.
EDIT
As per info I have seen on this page: https://plumbr.eu/blog/memory-leaks/...emory-than-xmx I have #commented the line out of the file and copied it and replaced the existing parameter that is supposed to limit memory usage with these two parameters: -Xmx30m -Xms30m
As for leaving the server for 7 days, in a state where I cannot update the OS with security updates is not something I can do. If the system as a whole is working then yes I can leave something running for 7 days and check how things are. I just cannot risk it if it means I have no ability to keep my server secure and updated.