Benchmarking the VM storage performance settings in SUSE Virtualization
I benchmarked every VM disk performance setting SUSE Virtualization 1.9.1 exposes, on local LVM and on Ceph RBD. The High Performance profile cuts write latency by about 40% on local storage, a supplemental I/O thread pool multiplies random-read IOPS by up to 2.4×, and the host page-cache modes are the ones to avoid.