For a while now, users have been complaining about slow saving or browsing of folders. I've noticed the same thing but very random (I don't save/browse much on our file server). Anyway, when this is happening.. users are usually sitting with an hour glass. If I check out "top" on the 2015.1 (2015 sp1?) server.. NDSD is always cranking away. Currently around 30% cpu/6% memory, fluctuates. I've tossed a ton of ram at this server (vm), and it seems to get eaten up. If I stop/restart NDSD, things seem to behave quickly for a bit. Any ideas here? Not sure what NDSD is so busy doing.. almost constantly.

top - 11:17:56 up 38 days, 13:19, 2 users, load average: 0.32, 0.25, 0.23
Tasks: 258 total, 1 running, 257 sleeping, 0 stopped, 0 zombie
Cpu(s): 34.8%us, 4.1%sy, 0.0%ni, 60.8%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
Mem: 13933M total, 13443M used, 490M free, 23M buffers
Swap: 4094M total, 474M used, 3620M free, 5548M cached

3595 root 20 0 1509m 828m 6160 S 36.9 5.9 1135:22 ndsd
7371 root 20 0 517m 36m 2484 S 1.0 0.3 493:49.22 cifsd
3 root 20 0 0 0 0 S 0.3 0.0 19:48.31 ksoftirqd/0