It is confusing because your subject line says XenServer. Webster From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of James Scanlon Subject: [THIN] Re: XenServer Slowdown the xenapp servers are all physical machines. no xenserver involved. The servers themselves have 146GB Mirrored SAS Network is dual 1GB Physical NICS teamed with HP software The ZDC is a virtual on vmware........? Its 4 Physical servers all having exactly the same issues..... :( Very much appreciate any further input!!! Thank you for your reply :) James _____ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Joe Shonk Subject: [THIN] Re: XenServer Slowdown Hello, What version of XenServer are you running and how many VMs? Did you select the Optimize for XenApp under each VM? What does you disk subsystem and network look like? Joe