After running both InnoDB Hot Backup and Xtrabackup, we have found that there is a measurable but not large difference between the resources that Xtrabackup and InnoDB Hot Backup consume.
- takes 1.1% longer (2 min during a 3 hour backup)
- uses 1.4% more space (1G more in a 70G backup — this was for uncompressed backups)
- uses 1.115% more cpu overall
- split as 0.12% user, 0.66% nice, 0.025% system, 0.31% more iowait,