ESX NFS Snapshot Issues

I have been having snapshot issues with ESX on Netapp NFS. The server is hanging for a long time when deleting snapshots. We are also seeing ESX Ranger issues when doing backups.

The Netapp guide mentions to install patch ESX350-200808401-BG. I am on the version 3 of ESX 3.5 so it wasnt necessary. All I had to do was add this line to the esx config file.

prefvmx.consolidateDeleteNFSLocks = "TRUE"