I have ESXi V5.1 running several virtual machines. Over the weekend, I upgraded ESXi from V4.0 to V5.1 successfully, applied VSphere 5 Essentials license, installed the backup software called "NAKIVO", performed virtual machine backups.
This morning, users complained that the database system was running slow, so I open vSphere Client and noticed "Remove snapshpt 20% FS1-W2003 VM" under Recent Tasks.
The database system runs on this particular VM. So that explains why users are experiencing "slowness".
Can you explain how/why this snapshot was created, why it is being removed now, and how I can make it so that it does not happen again during work hours?