Scan Time Problem After Upgrade

We began upgrading to 3.2.3 from 3.2.1. There are 5 machines. On the first machine prior to the upgrade the average scan time for a message was 2 to 4 seconds, fairly consistent at 2.5 or so seconds. After upgrading the same systems now have a scan time of 7 or more seconds. Not sure if this was a message related issue so we upgraded the second machine that was running the same way. Again, after the upgrade the scan times doubled our more. We then downgraded back to 3.2.1 on the first machine and the scan times went back to the lower time.

Everything looks like it's configured the same way. Anyone know what we may be experiencing?

GA