On Wed, 4 Nov 2020 at 20:06, Rob van der Heij <rvdh...@gmail.com> wrote:
> > On Wed, 4 Nov 2020 at 19:30, Dave Jones <djo...@itconline.com> wrote > > What is the CP overhead of managing this? The one Linux guest that is >> running here reports a %steal of 15-17%, which I think is a bit high. >> > At the risk of teaching granny... the most common cause for reported high "steal percentage" in Linux is not CP overhead on I/O, but contention for CPU resources on z/VM and PR/SM level. And when you see high %steal combined with %idle in the guest, then it may well be due to an application causing a high amount of polling (and lowering the number of virtual CPUs closer to the allocated capacity may be helpful). Rob ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www2.marist.edu/htbin/wlvindex?LINUX-390
