Jumbo frames being good or bad, depends heavily on the switching infrastructure.   If the switches are not sufficient to handle jumbo frames and flowcontrol, then performance could be worse with Jumbo frames enabled. If the switches are not on the certified list for EQL arrays,  I tend to start with standard frames, get a baseline run, then try Jumbo Frames incrementally and make sure things don't get worse. Jumbo Frames can provide a benefit, it will never be a huge increase, but it does improve the network efficiency and might reduce CPU overhead.    That are not a requirement for EQL iSCSI environments.  Please check out the best practices with ESX document.  That can really help maximize your performance with EQL storage. [URL]  Regards,
Hi to everyone on the wonderful Equallogic forums :) We have an EQL PS4100X running VM's on vSphere 5.1. Everything is working great and we're about to migrate our main production database to a SQL 2012 VM. I've been doing some research on whether we should enable jumbo frames on the VMXNET3 adapter in the VM. From reading this white paper it seems there are major performance advantages to enabling jumbo frames and some other options within the NIC settings: [URL] Just curious as to what other people do and if they've seen any improvement in performance. Anyone had any experience with this ? Thanks Lee
Enabling Jumbo Frames on VMXNET3 adapter in Windows Server 2012