Our backups on our virtual windows server 2012 R2 which is hosted on Hyper-V server 2012 R2 have been taking at least 3 hours longer than they used to.
We use windows Server Backup for nightly backups which backs up to a local volume. We also use a powershell script for the weekly backup which also runs through wbadmin and backs up to a network share.
A couple weeks ago the backups started taking 3-5 hours longer. I monitored them and noticed that they have been taking hours to compact the virtual hard disks at the end of the backups.
I refereed to the following link about this process and it should not be happening for every backup.
http://support.microsoft.com/kb/2524602/en-us
We installed windows updates after this problem began but its is still happening for every backup.
What can we do to stop this?