We have found at more than 7 sites whom we have built on or upgraded to ESXi 6 and we are using the VMXNET3 adapter extreme slowness to SQL and other database applications. Here is what we have gathered so far.
Conditions:
ESXi 5.5u2 or newer including all version of 6
Windows 8 or newer / Windows 2012 or newer
VMXNET3 adapter on client side using one of the above OS's
SQL or other Database application on Server
SQL or other Database application and Client are on different hosts (condition does not exist on same host and does not affect physical clients accessing the database)
Solution:
Change to E1000 adapter and the problem goes away
We are able to reproduce the issue at more that 7 client sites.
Anyone else seen this behavior and have a fix that does not include removing the VMXNET3 adapter?
Sean