Bastian Blank: [ Charset UTF-8 unsupported, converting... ] > On Mon, Oct 11, 2010 at 04:27:13PM +0200, Patric Falinder wrote: > > I'm running Debian Lenny x64 with Postfix 2.5.5 with VDA patch. > > VDA is supported where? > > > It's virtualized on a VMWare ESX server. > > Don't really know what tick-less timer support is so I guess I don't use > > it unless it's standard in Debian!? > > Sure it is. > > | $ grep NO_HZ /boot/config-2.6.26-2-amd64 > | CONFIG_NO_HZ=y > > If this would be a common problem, I would expect at least one bug for > this, but I didn't find any. VMWare ESX is not that exotic. So it is > either related to you patches or your specific configuration.
Actually, lost timer interrupts are a known problem with virtual execution environments. They are less of a problem for web servers, but can affect programs with more complex scheduling requirements such as Postfix. http://www.vmware.com/files/pdf/Timekeeping-In-VirtualMachines.pdf Wietse
