I upgraded my 3.2.5 environment to 3.3.0 this morning. I'm seeing an approx 4x 
increase in network activity since the upgrade. tcpdump indicates a volume 
which is pretty much 100% reads has a lot of tcp activity between the nodes. 
Since it is mounted NFS, I was expecting that for a 'nearly all read' workload 
it would utilize the OS cache (this is what I experienced when we moved from 
Fuse to NFS under 3.2.5).

Is there a volume tweak or a change to NFS I need to make to utilize OS 
caching? We're running on RHEL6. Here is my mount output for this volume.

localhost:/ldirectord on /etc/ldirectord type nfs 
(rw,noatime,nodiratime,tcp,vers=3,nolock,addr=127.0.0.1)

Thanks-
David
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