Visvanath Ratnaweera

I don't want to disturb the jump mid-air. But I thought the hop is 1.9.last > 2.2.last(?).

I hope, either you have left the upgraded 1.9.19+ version intact and doing this on a copy, or you have made good backup! There is no way of undoing a crashed upgrade!

This is why I said, the jump to Moodle 2 is more than just a jump. You need to start the upgrade again and either read the suggestions others have made or read the documentation carefully and/or ask others.

Analog to https://docs.moodle.org/29/en/Upgrading there is an https://docs.moodle.org/19/en/Upgrading.

You didn't say from which version. Since you mention 2008, could it be Moodle 1.9? (What was the 2008 reply from "Martin"? Could you post the link to that discussion?)

Yes, since 1.9 along the 2 series Moodle has demanded more resources each release. We are talking of 10 releases up the ladder! If you current server barely manages the load with 1.9 it will fail with 2.9. Then, nobody could foresee whether additional 1 GB will solve the problem.

It is a common term used by hosting providers. See https://en.wikipedia.org/wiki/Shared_web_hosting_service. Customers have no way of knowing what other customers do.