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Hi @avladu Thx for your reply. Actually the vm's get slower and slower to boot by increasing ram quantity. For exemple a VM with 128GB of ram will take 45 min to cold boot (the reboot is normal). Below are the versions:

/usr/bin/qemu-system-x86_64 --version

QEMU emulator version 4.2.1 (Debian 1:4.2-3ubuntu6.23~cloud0) Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers

libvirtd --version

libvirtd (libvirt) 6.0.0 root@os-compute3:~# virsh version Compiled against library: libvirt 6.0.0 Using library: libvirt 6.0.0 Using API: QEMU 6.0.0 Running hypervisor: QEMU 4.2.1

cat /proc/version

Linux version 4.15.0-88-generic (buildd@lgw01-amd64-036) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)) #88-Ubuntu SMP Tue Feb 11 20:11:34 UTC 2020

This issue was mentionned in this presentation but no clear fix is proposed https://lathiat.net/files/talklca2020ceph_story.pdf

Any help will be greatly appreciated Rony

Hi @avladu Thx for your reply. Actually the vm's get slower and slower to boot by increasing ram quantity. For exemple a VM with 128GB of ram will take 45 min to cold boot (the reboot is normal). Below are the versions:

/usr/bin/qemu-system-x86_64 --version

QEMU emulator version 4.2.1 (Debian 1:4.2-3ubuntu6.23~cloud0) Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers

libvirtd --version

libvirtd (libvirt) 6.0.0 root@os-compute3:~# virsh version Compiled against library: libvirt 6.0.0 Using library: libvirt 6.0.0 Using API: QEMU 6.0.0 Running hypervisor: QEMU 4.2.1

cat /proc/version

Linux version 4.15.0-88-generic (buildd@lgw01-amd64-036) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)) #88-Ubuntu SMP Tue Feb 11 20:11:34 UTC 2020

This issue was mentionned in this presentation but no clear fix is proposed https://lathiat.net/files/talklca2020ceph_story.pdf

Any help will be greatly appreciated Rony