So too is disk space it seems. Nice Apple:

Apr 21 09:22:22 waldomp.local com.apple.backupd[1411]: Will copy (398.1 MB) from Macintosh HD
Apr 21 09:22:22 waldomp.local com.apple.backupd[1411]: Found 8874 files (775.6 MB) needing backup
Apr 21 09:22:23 waldomp.local com.apple.backupd[1411]: 10.34 GB required (including padding), 2.44 TB available