.
.  
# ESXi NFS settings
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65535 16777216
net.core.netdev_max_backlog = 30000
vm.dirty_background_ratio = 1
vm.dirty_expire_centisecs = 1000
vm.dirty_ratio = 10
vm.dirty_writeback_centisecs = 100
vm.vfs_cache_pressure = 40