Riak Save Update speed is too slow

Hi All, I Have 6 riak kv nodes, each VM have 30gb RAM VM, 8core CUP, 1gbps Ethernet bandwidth CPU and IO utilization is not issue load average: 1.14, 1.26, 1.40 root@E2ERiakNode1:~# iperf -c 172.16.98.55 -p 8087 Client connecting to 17

Riak performance tuning

Hi, I have a 3 node riak cluster, with ring_size=64, n_val=2. when I run benchmark using basho_bench, my initial results are about 12k ops but it drops very much. during this time, riak write rate on my disk is about 200 ops; so it's seem logical to see performance drop after some time. but I can't