Our netbackup db was up to 50 gig and had consumed 95% of the disk space so
I upgraded the disks and all was well again. It had been at 85% and climbing
for a few weeks. 

Once I upgraded the netbackup db suddenly dropped to 30 gig. This leaves me
wondering how much space, either % free or gigabytes, does netbackup require
to compress its database?

Nothing is missing or not functioning so the upgrade worked fine. The
database hadn't compressed itself in more than 2 weeks from what I can tell.

Any info?

Thanks