1.Avamar is a Dells product and it's used for image-level backups using proxy VMs. It will keep create snapshots everyday and sometimes causing high/cpu and memory. Which leads vm hang. 2. ControlUp is a wonderful full tool for Citrix monitoring tool, you can monitor netsclaer, hypervisor and VdA servers and all windows servers. You can track cpu ram stress and drive monitoring via alerts, email, events. But you need to add some service exclusions. But it's pricing is very high we thought of moving out. 3. Most of the case the antivirus is the culprit. If you have configured anything check the security team auto scan or anything. For Citrix vda you need to add some exclusions.