I dont think its a netapp Bottleneck. But the last thing we can check during snapshot is that:
priv set advanced # Set permissions mode for advanced admin rights
statit -b # Start statit data capture in background
statit -e # Stop statit capture and dump data
priv set # Return permissions mode to default
After "statit -b" a large output is done. Can you post it?
And then wee need to dig in esxtop:
esxtop -b -a -d 2 -n 300 | gzip -9c > esxtopoutput.csv.gz
You need to check that 300 literations is long enough. Sowe can dig in with virtualesxtop.