Guide for upgrading does not include instructions for 8.5.x

Progress!!!

So I’ve been able to run the first step of the update process.

Thanks to this post:

I ran the following command, before doing the upgrade:

chmod +x ./bin/console

Response was:

SuiteCRM Upgrade
============

Running: backup-original-modules
step: backup-original-modules | status: done
Successfully backed up files
Running: check-package
step: check-package | status: done
Package found in path
Running: extract-package
step: extract-package | status: done
Package extracted
Running: check-permissions
step: check-permissions | status: done
Permissions checked
Running: install-upgrade-package
step: install-upgrade-package | status: done
Successfully installed package
Running: clear-symfony-cache
step: clear-symfony-cache | status: done
Successfully cleared cache
Warning! Please re-set permissions after this upgrade step has completed

However, when running the post update command, it gives me the following error:

SuiteCRM Finalize Upgrade
============

Running: legacy-post-upgrade

mmap() failed: [12] Cannot allocate memory

mmap() failed: [12] Cannot allocate memory

mmap() failed: [12] Cannot allocate memory

mmap() failed: [12] Cannot allocate memory

mmap() failed: [12] Cannot allocate memory

Is this a massive problem though?
And how do I check that the update was done successfully?

Thanks a lot for your help so far in this…