You can list all advanced setting in SSH from your host with that command line :
# esxcli system settings advanced list | less
And setup it like this
# esxcli system settings advanced set -help
Since 5.x the default queue depth for HBAs in ESXi has been 64 for Qlogic HBAs and 32 for Emulex/Brocade. It is configurable and there are plenty of articles on how to do it for the different vendors (Qlogic, Emulex, etc).