Single Hyper-V 2012 host server, one Windows Server 2012 VM running SQL Server 2016.
iSCSI storage is connected to host via two 1G links (MPIO).
PerfMon traces on the host server show high latency (40ms+) on iSCSI NICs, but only 20-50% bandwidth usage.
Storage system stats show similar info to host.
We're considering upgrading the SAN to 10GbE, but not sure that would improve performance we're not maxing out the current bandwidth. Same uncertainty for adding additional links from host to storage
What other information can we gather toward identifying bottlenecks?
How can we improve iSCSI latency?