The upgrade.sh script, used to update your p4/p4d executables and corresponding database, starts with the message:
"Processing. This may take a while depending on checkpoint duration."
However, there appears to be no 'checkpoint' process kicked off by this script. The closest is a journal rotation of production and replay against offline, prior to the '-xu'.
Should the script be creating a checkpoint as part of this process? if not, the initial message is misleading.
If the user needs to carry out any additional steps post-upgrade, the script should provide this information at the end.