Hi, guys.
I think we have the same problem with disk load on our environment.
We also use CB community edition v4.0.0-4051 on ubuntu 14.04 (virtual environment on Xen). We have only one node in cluster and have around 300 ops/s on couchbase and our disk is used for 99%.
We get from “iostat -mx 5”:
Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
sda 0.00 288.40 0.00 185.80 0.00 2.55 28.06 2.88 15.29 0.00 15.29 5.32 98.88
dm-0 0.00 0.00 0.00 474.40 0.00 2.54 10.96 6.69 14.03 0.00 14.03 2.09 98.96
sdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Any advice to solve this issue?