On Tue, Mar 10, 2020 at 04:20:22PM +0100, Frank Kardel wrote: > This is my first XEN setup so I may have misconfigured something: > > I have a 4G DOM0 on a 512G System with a EPYC 7302P 16-Core Processor. > > On that I configured a 400G DOMU with 12 vcpus. like this: > > name = "system" > kernel = "/netbsd-XEN3_DOMU.gz" > memory = 400000 > cpus="all" > vcpus=4 > maxvcpus=12 > vif = [ 'mac=aa:00:00:d1:00:01,bridge=bridge0', > 'mac=aa:00:00:d1:00:02,bridge=bridge1' ] > disk = [ 'file:/data0/xen-roots/root-Alpine-system.img,0x0,w', > 'phy:/dev/wedges/data1,0x1,w' ] > > On that I run postgresql 11 attempting to load a 1TB database. > > Usually this workload keeps a machine continually busy cpu/io-wise. > > I was expecting that I/O via the xen backend would be the bottleneck. > > Instead DOM0 is only seldom busy for IO. DOMU is crawling along sleeping > > at all sorts of places:
What does iostat 5 show about the disks, in the dom0 and domU ? -- Manuel Bouyer <[email protected]> NetBSD: 26 ans d'experience feront toujours la difference --
