Attempted an upgrade from 3.2.12 to 4.5.4 in July.
My Database is about 20 Gigs. I was able to complete the encoding on a test database (I restored a copy of prod to a test server and ran the updates) The installer took a few hours to run, but successfully completed. This was were PHP and the DB were on the same server
I did have to use the command line PHP to allow the job enough time to run
Flash forward to prod, I did the install and tried to convert the database over, after 8 hours I only got about 50Megs in. I aborted and rolled back.
Any hints on how to convert the databases? the prod database server does not have PHP installed.