We have our operational as well as decision making databases both running on Percona MySQL 5.7.10. The OS is Ubuntu 16.04. On these various database instances we have been using Percona Innobackupex (Xtrabackup) for daily and incremental backups. Both of these backup types take the same amount of time to finish. For our Data Warehouse, running on an AWS ec2 m4.2xlarge instance type, which is around 3 TB in size both the full and incremental take around 5-6 hours to finish. Shouldn't the incremental finish faster?
Based on the full backup taken a day before, I've tried testing the incremental backup numerous times and each time I found it to be taking the same time as the full backup.
Any help or pointers to this would of be of great help.