I have (as some are probably tired of seeing on SF) a Dell 2950, dual 4 core 3Ghz processors running ESXi. I noticed on the VSphere management console that the server says it doesn't have hyperthreading enabled ("inactive")
Apparently it is by default turned off in the BIOS.
I know I could shut down all the VM's and reboot and edit that setting, but should I? Is there a real benefit to having hyperthreading enabled on this type of setup, or is the performance gain marginal, if any??
Best Answer
I've only read about this topic a handful of times. I found an article at www.vmguy.com here that sums up the consensus on this HT issue (direct from the article):
Again, this is directly from the article. I'm not certain that HT is worth it as I too use AMD Opterons so I can't speak from experience.