Is this normal or expected that lvm can have high utilization while the
disk the logical volume is, has not? Or do I need to do still custom
optimizations for the ceph rbd backend?
https://www.redhat.com/archives/linux-lvm/2013-October/msg00022.html
Atop:
LVM | Groot-LVroot | busy 74% | read 0 | write 428 |
KiB/r 0 | KiB/w 11 | MBr/s 0.0 | MBw/s 0.5 | avio 17.2
ms |
DSK | vda | busy 5% | read 0 | write 585 |
KiB/r 0 | KiB/w 8 | MBr/s 0.0 | MBw/s 0.5 | avio 0.89
ms |
[@~]# pvs
PV VG Fmt Attr PSize PFree
/dev/vda2 VGroot lvm2 a-- <7.61g 788.00m
Luminous 12.2.10, all (ceph nodes, libvirt, test vm) have default
centos7.6 (with default kernel)
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