I have a 55 Gig database, and the differential backup for yesterday was 32 Gig !! It was about 5 gig the day before
So, I assumed I could look at my transaction log backups and find a huge T-log backup to identify what time of day something big happened. But my t-logs, every 15 minutes, show 1 backup > 1 gig, and all the others quite small, and similar to other days this week.
What can make a huge Diff backup, without generating huge t-log backup(s) ?