Hi,
I've got an issue with a LXC VM, with a really slow backup speed/time. It's the nextcloud VM, vmid 150. I've got no idea why this one is slow, but not the others.
Here are my logs :
Thanks a lot for your help.
I've got an issue with a LXC VM, with a really slow backup speed/time. It's the nextcloud VM, vmid 150. I've got no idea why this one is slow, but not the others.
Here are my logs :
Code:
Details
VMID Name Status Time Size Filename
104 omv ok 16m 24s 500 GiB vm/104/2025-11-18T00:30:01Z
105 nextcloud ok 3h 48m 27s 465.55 GiB ct/105/2025-11-18T00:46:25Z
106 database ok 36s 5.108 GiB ct/106/2025-11-18T04:34:52Z
Total running time: 4h 5m 27s
Total size: 970.659 GiB
Logs
vzdump 105 106 104 --fleecing 0 --quiet 1 --storage pbs --notification-mode legacy-sendmail --mailto XXX --mode snapshot --node proxmox --notes-template '{{guestname}}' --mailnotification always
104: 2025-11-18 01:30:01 INFO: Starting Backup of VM 104 (qemu)
104: 2025-11-18 01:30:01 INFO: status = running
104: 2025-11-18 01:30:01 INFO: VM Name: omv
104: 2025-11-18 01:30:01 INFO: include disk 'scsi0' 'local-zfs:vm-104-disk-0' 50G
104: 2025-11-18 01:30:01 INFO: exclude disk 'scsi1' 'zfs-data:vm-104-disk-0' (backup=no)
104: 2025-11-18 01:30:01 INFO: include disk 'scsi2' 'zfs-data:vm-104-disk-1' 250G
104: 2025-11-18 01:30:01 INFO: include disk 'scsi3' 'zfs-data:vm-104-disk-2' 200G
104: 2025-11-18 01:30:01 INFO: backup mode: snapshot
104: 2025-11-18 01:30:01 INFO: ionice priority: 7
104: 2025-11-18 01:30:01 INFO: snapshots found (not included into backup)
104: 2025-11-18 01:30:01 INFO: creating Proxmox Backup Server archive 'vm/104/2025-11-18T00:30:01Z'
104: 2025-11-18 01:30:01 INFO: issuing guest-agent 'fs-freeze' command
104: 2025-11-18 01:30:11 INFO: issuing guest-agent 'fs-thaw' command
104: 2025-11-18 01:30:17 INFO: started backup task '032791ab-14e1-4a90-aceb-e05159df58ef'
104: 2025-11-18 01:30:17 INFO: resuming VM again
104: 2025-11-18 01:30:17 INFO: scsi0: dirty-bitmap status: OK (13.3 GiB of 50.0 GiB dirty)
104: 2025-11-18 01:30:17 INFO: scsi2: dirty-bitmap status: OK (4.0 MiB of 250.0 GiB dirty)
104: 2025-11-18 01:30:17 INFO: scsi3: dirty-bitmap status: OK (2.5 GiB of 200.0 GiB dirty)
104: 2025-11-18 01:30:17 INFO: using fast incremental mode (dirty-bitmap), 15.9 GiB dirty of 500.0 GiB total
104: 2025-11-18 01:30:20 INFO: 3% (620.0 MiB of 15.9 GiB) in 3s, read: 206.7 MiB/s, write: 188.0 MiB/s
104: 2025-11-18 01:30:23 INFO: 5% (952.0 MiB of 15.9 GiB) in 6s, read: 110.7 MiB/s, write: 61.3 MiB/s
104: 2025-11-18 01:30:26 INFO: 6% (1.0 GiB of 15.9 GiB) in 9s, read: 25.3 MiB/s, write: 24.0 MiB/s
104: 2025-11-18 01:30:29 INFO: 8% (1.3 GiB of 15.9 GiB) in 12s, read: 104.0 MiB/s, write: 80.0 MiB/s
104: 2025-11-18 01:30:32 INFO: 9% (1.5 GiB of 15.9 GiB) in 15s, read: 52.0 MiB/s, write: 18.7 MiB/s
104: 2025-11-18 01:30:35 INFO: 10% (1.6 GiB of 15.9 GiB) in 18s, read: 56.0 MiB/s, write: 45.3 MiB/s
104: 2025-11-18 01:30:38 INFO: 11% (1.8 GiB of 15.9 GiB) in 21s, read: 57.3 MiB/s, write: 56.0 MiB/s
104: 2025-11-18 01:30:41 INFO: 12% (2.0 GiB of 15.9 GiB) in 24s, read: 57.3 MiB/s, write: 54.7 MiB/s
104: 2025-11-18 01:30:44 INFO: 13% (2.1 GiB of 15.9 GiB) in 27s, read: 41.3 MiB/s, write: 41.3 MiB/s
104: 2025-11-18 01:30:47 INFO: 14% (2.3 GiB of 15.9 GiB) in 30s, read: 73.3 MiB/s, write: 69.3 MiB/s
104: 2025-11-18 01:30:50 INFO: 15% (2.5 GiB of 15.9 GiB) in 33s, read: 66.7 MiB/s, write: 64.0 MiB/s
104: 2025-11-18 01:30:53 INFO: 16% (2.6 GiB of 15.9 GiB) in 36s, read: 50.7 MiB/s, write: 44.0 MiB/s
104: 2025-11-18 01:30:56 INFO: 19% (3.1 GiB of 15.9 GiB) in 39s, read: 169.3 MiB/s, write: 157.3 MiB/s
104: 2025-11-18 01:30:59 INFO: 24% (3.9 GiB of 15.9 GiB) in 42s, read: 269.3 MiB/s, write: 264.0 MiB/s
104: 2025-11-18 01:31:02 INFO: 28% (4.6 GiB of 15.9 GiB) in 45s, read: 226.7 MiB/s, write: 226.7 MiB/s
104: 2025-11-18 01:31:05 INFO: 33% (5.3 GiB of 15.9 GiB) in 48s, read: 232.0 MiB/s, write: 229.3 MiB/s
104: 2025-11-18 01:31:08 INFO: 35% (5.6 GiB of 15.9 GiB) in 51s, read: 117.3 MiB/s, write: 117.3 MiB/s
104: 2025-11-18 01:31:11 INFO: 38% (6.1 GiB of 15.9 GiB) in 54s, read: 160.0 MiB/s, write: 160.0 MiB/s
104: 2025-11-18 01:31:14 INFO: 40% (6.4 GiB of 15.9 GiB) in 57s, read: 113.3 MiB/s, write: 113.3 MiB/s
104: 2025-11-18 01:31:17 INFO: 44% (7.0 GiB of 15.9 GiB) in 1m, read: 193.3 MiB/s, write: 193.3 MiB/s
104: 2025-11-18 01:31:20 INFO: 47% (7.5 GiB of 15.9 GiB) in 1m 3s, read: 177.3 MiB/s, write: 177.3 MiB/s
104: 2025-11-18 01:31:23 INFO: 50% (8.1 GiB of 15.9 GiB) in 1m 6s, read: 193.3 MiB/s, write: 193.3 MiB/s
104: 2025-11-18 01:31:26 INFO: 53% (8.5 GiB of 15.9 GiB) in 1m 9s, read: 164.0 MiB/s, write: 164.0 MiB/s
104: 2025-11-18 01:31:29 INFO: 55% (8.8 GiB of 15.9 GiB) in 1m 12s, read: 102.7 MiB/s, write: 101.3 MiB/s
104: 2025-11-18 01:31:53 INFO: 56% (8.9 GiB of 15.9 GiB) in 1m 36s, read: 1.8 MiB/s, write: 1.8 MiB/s
104: 2025-11-18 01:32:22 INFO: 57% (9.0 GiB of 15.9 GiB) in 2m 5s, read: 5.4 MiB/s, write: 5.4 MiB/s
104: 2025-11-18 01:33:00 INFO: 58% (9.2 GiB of 15.9 GiB) in 2m 43s, read: 4.3 MiB/s, write: 4.3 MiB/s
104: 2025-11-18 01:33:21 INFO: 59% (9.4 GiB of 15.9 GiB) in 3m 4s, read: 7.6 MiB/s, write: 7.6 MiB/s
104: 2025-11-18 01:33:49 INFO: 60% (9.6 GiB of 15.9 GiB) in 3m 32s, read: 8.1 MiB/s, write: 8.1 MiB/s
104: 2025-11-18 01:34:23 INFO: 61% (9.7 GiB of 15.9 GiB) in 4m 6s, read: 3.2 MiB/s, write: 3.2 MiB/s
104: 2025-11-18 01:34:44 INFO: 62% (9.9 GiB of 15.9 GiB) in 4m 27s, read: 10.9 MiB/s, write: 10.9 MiB/s
104: 2025-11-18 01:35:31 INFO: 63% (10.0 GiB of 15.9 GiB) in 5m 14s, read: 1.8 MiB/s, write: 1.8 MiB/s
104: 2025-11-18 01:35:55 INFO: 64% (10.2 GiB of 15.9 GiB) in 5m 38s, read: 6.8 MiB/s, write: 6.8 MiB/s
104: 2025-11-18 01:36:06 INFO: 65% (10.3 GiB of 15.9 GiB) in 5m 49s, read: 14.5 MiB/s, write: 14.5 MiB/s
104: 2025-11-18 01:36:52 INFO: 66% (10.5 GiB of 15.9 GiB) in 6m 35s, read: 3.6 MiB/s, write: 3.5 MiB/s
104: 2025-11-18 01:36:55 INFO: 67% (10.7 GiB of 15.9 GiB) in 6m 38s, read: 80.0 MiB/s, write: 80.0 MiB/s
104: 2025-11-18 01:36:58 INFO: 68% (10.8 GiB of 15.9 GiB) in 6m 41s, read: 28.0 MiB/s, write: 28.0 MiB/s
104: 2025-11-18 01:37:58 INFO: 69% (11.1 GiB of 15.9 GiB) in 7m 41s, read: 5.3 MiB/s, write: 5.3 MiB/s
104: 2025-11-18 01:38:01 INFO: 70% (11.1 GiB of 15.9 GiB) in 7m 44s, read: 4.0 MiB/s, write: 4.0 MiB/s
104: 2025-11-18 01:39:00 INFO: 71% (11.3 GiB of 15.9 GiB) in 8m 43s, read: 3.4 MiB/s, write: 3.3 MiB/s
104: 2025-11-18 01:39:04 INFO: 72% (11.5 GiB of 15.9 GiB) in 8m 47s, read: 39.0 MiB/s, write: 39.0 MiB/s
104: 2025-11-18 01:39:32 INFO: 73% (11.6 GiB of 15.9 GiB) in 9m 15s, read: 4.7 MiB/s, write: 4.7 MiB/s
104: 2025-11-18 01:39:41 INFO: 74% (11.8 GiB of 15.9 GiB) in 9m 24s, read: 26.7 MiB/s, write: 26.7 MiB/s
104: 2025-11-18 01:39:44 INFO: 75% (12.0 GiB of 15.9 GiB) in 9m 27s, read: 70.7 MiB/s, write: 70.7 MiB/s
104: 2025-11-18 01:40:01 INFO: 76% (12.1 GiB of 15.9 GiB) in 9m 44s, read: 6.6 MiB/s, write: 6.6 MiB/s
104: 2025-11-18 01:40:04 INFO: 77% (12.2 GiB of 15.9 GiB) in 9m 47s, read: 26.7 MiB/s, write: 26.7 MiB/s
104: 2025-11-18 01:40:07 INFO: 78% (12.4 GiB of 15.9 GiB) in 9m 50s, read: 68.0 MiB/s, write: 66.7 MiB/s
104: 2025-11-18 01:40:18 INFO: 79% (12.6 GiB of 15.9 GiB) in 10m 1s, read: 16.7 MiB/s, write: 16.7 MiB/s
104: 2025-11-18 01:40:21 INFO: 80% (12.8 GiB of 15.9 GiB) in 10m 4s, read: 84.0 MiB/s, write: 84.0 MiB/s
104: 2025-11-18 01:40:26 INFO: 81% (12.8 GiB of 15.9 GiB) in 10m 9s, read: 1.6 MiB/s, write: 1.6 MiB/s
104: 2025-11-18 01:40:46 INFO: 82% (13.1 GiB of 15.9 GiB) in 10m 29s, read: 12.4 MiB/s, write: 12.4 MiB/s
104: 2025-11-18 01:40:49 INFO: 83% (13.2 GiB of 15.9 GiB) in 10m 32s, read: 25.3 MiB/s, write: 24.0 MiB/s
104: 2025-11-18 01:40:52 INFO: 84% (13.4 GiB of 15.9 GiB) in 10m 35s, read: 65.3 MiB/s, write: 65.3 MiB/s
104: 2025-11-18 01:40:55 INFO: 85% (13.5 GiB of 15.9 GiB) in 10m 38s, read: 45.3 MiB/s, write: 45.3 MiB/s
104: 2025-11-18 01:41:15 INFO: 86% (13.7 GiB of 15.9 GiB) in 10m 58s, read: 9.2 MiB/s, write: 9.2 MiB/s
104: 2025-11-18 01:41:19 INFO: 87% (13.8 GiB of 15.9 GiB) in 11m 2s, read: 37.0 MiB/s, write: 37.0 MiB/s
104: 2025-11-18 01:41:23 INFO: 88% (14.0 GiB of 15.9 GiB) in 11m 6s, read: 37.0 MiB/s, write: 37.0 MiB/s
104: 2025-11-18 01:41:27 INFO: 89% (14.1 GiB of 15.9 GiB) in 11m 10s, read: 43.0 MiB/s, write: 43.0 MiB/s
104: 2025-11-18 01:41:42 INFO: 90% (14.3 GiB of 15.9 GiB) in 11m 25s, read: 12.3 MiB/s, write: 12.3 MiB/s
104: 2025-11-18 01:41:50 INFO: 91% (14.4 GiB of 15.9 GiB) in 11m 33s, read: 18.0 MiB/s, write: 18.0 MiB/s
104: 2025-11-18 01:42:24 INFO: 92% (14.6 GiB of 15.9 GiB) in 12m 7s, read: 4.9 MiB/s, write: 4.9 MiB/s
104: 2025-11-18 01:42:28 INFO: 93% (14.8 GiB of 15.9 GiB) in 12m 11s, read: 60.0 MiB/s, write: 60.0 MiB/s
104: 2025-11-18 01:42:31 INFO: 94% (15.0 GiB of 15.9 GiB) in 12m 14s, read: 49.3 MiB/s, write: 49.3 MiB/s
104: 2025-11-18 01:42:34 INFO: 96% (15.3 GiB of 15.9 GiB) in 12m 17s, read: 92.0 MiB/s, write: 90.7 MiB/s
104: 2025-11-18 01:42:41 INFO: 97% (15.4 GiB of 15.9 GiB) in 12m 24s, read: 21.1 MiB/s, write: 21.1 MiB/s
104: 2025-11-18 01:42:44 INFO: 98% (15.6 GiB of 15.9 GiB) in 12m 27s, read: 61.3 MiB/s, write: 60.0 MiB/s
104: 2025-11-18 01:42:58 INFO: 99% (15.9 GiB of 15.9 GiB) in 12m 41s, read: 20.0 MiB/s, write: 20.0 MiB/s
104: 2025-11-18 01:43:43 INFO: 100% (15.9 GiB of 15.9 GiB) in 13m 26s, read: 91.0 KiB/s, write: 91.0 KiB/s
104: 2025-11-18 01:46:25 INFO: backup was done incrementally, reused 484.68 GiB (96%)
104: 2025-11-18 01:46:25 INFO: transferred 15.86 GiB in 968 seconds (16.8 MiB/s)
104: 2025-11-18 01:46:25 INFO: adding notes to backup
104: 2025-11-18 01:46:25 INFO: Finished Backup of VM 104 (00:16:24)
105: 2025-11-18 01:46:25 INFO: Starting Backup of VM 105 (lxc)
105: 2025-11-18 01:46:25 INFO: status = running
105: 2025-11-18 01:46:25 INFO: CT Name: nextcloud
105: 2025-11-18 01:46:25 INFO: including mount point rootfs ('/') in backup
105: 2025-11-18 01:46:25 INFO: including mount point mp0 ('/media/nextcloud-data') in backup
105: 2025-11-18 01:46:25 INFO: backup mode: snapshot
105: 2025-11-18 01:46:25 INFO: ionice priority: 7
105: 2025-11-18 01:46:25 INFO: suspend vm to make snapshot
105: 2025-11-18 01:46:25 INFO: create storage snapshot 'vzdump'
105: 2025-11-18 01:48:08 INFO: resume vm
105: 2025-11-18 01:48:08 INFO: guest is online again after 103 seconds
105: 2025-11-18 01:48:08 INFO: creating Proxmox Backup Server archive 'ct/105/2025-11-18T00:46:25Z'
105: 2025-11-18 01:48:08 INFO: set max number of entries in memory for file-based backups to 1048576
105: 2025-11-18 01:48:08 INFO: run: lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- /usr/bin/proxmox-backup-client backup --crypt-mode=none pct.conf:/var/tmp/vzdumptmp1078781_105/etc/vzdump/pct.conf root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --include-dev /mnt/vzsnap0/./media/nextcloud-data --skip-lost-and-found --exclude=/tmp/?* --exclude=/var/tmp/?* --exclude=/var/run/?*.pid --backup-type ct --backup-id 105 --backup-time 1763426785 --entries-max 1048576 --repository root@pam@XXX:backup-local
105: 2025-11-18 01:48:08 INFO: Starting backup: ct/105/2025-11-18T00:46:25Z
105: 2025-11-18 01:48:08 INFO: Client name: proxmox
105: 2025-11-18 01:48:08 INFO: Starting backup protocol: Tue Nov 18 01:48:08 2025
105: 2025-11-18 01:48:09 INFO: Downloading previous manifest (Mon Nov 17 02:12:52 2025)
105: 2025-11-18 01:48:09 INFO: Upload config file '/var/tmp/vzdumptmp1078781_105/etc/vzdump/pct.conf' to 'root@pam@XXX:8007:backup-local' as pct.conf.blob
105: 2025-11-18 01:48:09 INFO: Upload directory '/mnt/vzsnap0' to 'root@pam@XXX:8007:backup-local' as root.pxar.didx
105: 2025-11-18 01:49:10 INFO: processed 5.538 GiB in 1m, uploaded 0 B
105: 2025-11-18 01:50:10 INFO: processed 9.681 GiB in 2m, uploaded 0 B
105: 2025-11-18 01:51:10 INFO: processed 15.098 GiB in 3m, uploaded 0 B
105: 2025-11-18 01:52:10 INFO: processed 17.535 GiB in 4m, uploaded 0 B
105: 2025-11-18 01:53:10 INFO: processed 18.941 GiB in 5m, uploaded 0 B
105: 2025-11-18 01:54:10 INFO: processed 20.801 GiB in 6m, uploaded 0 B
105: 2025-11-18 01:55:10 INFO: processed 21.23 GiB in 7m, uploaded 0 B
105: 2025-11-18 01:56:10 INFO: processed 21.49 GiB in 8m, uploaded 0 B
105: 2025-11-18 01:57:10 INFO: processed 21.87 GiB in 9m, uploaded 0 B
105: 2025-11-18 01:58:10 INFO: processed 22.728 GiB in 10m, uploaded 0 B
[...]
105: 2025-11-18 05:28:10 INFO: processed 442.772 GiB in 3h 40m 0s, uploaded 224.86 MiB
105: 2025-11-18 05:29:10 INFO: processed 443.668 GiB in 3h 41m 0s, uploaded 224.86 MiB
105: 2025-11-18 05:30:10 INFO: processed 447.238 GiB in 3h 42m 0s, uploaded 224.86 MiB
105: 2025-11-18 05:31:10 INFO: processed 448.48 GiB in 3h 43m 0s, uploaded 224.86 MiB
105: 2025-11-18 05:32:10 INFO: processed 448.968 GiB in 3h 44m 0s, uploaded 224.86 MiB
105: 2025-11-18 05:33:10 INFO: processed 452.859 GiB in 3h 45m 0s, uploaded 224.86 MiB
105: 2025-11-18 05:34:10 INFO: processed 455.778 GiB in 3h 46m 0s, uploaded 231.926 MiB
105: 2025-11-18 05:34:49 INFO: root.pxar: had to backup 551.261 MiB of 465.528 GiB (compressed 208.387 MiB) in 13599.36 s (average 41.508 KiB/s)
105: 2025-11-18 05:34:49 INFO: root.pxar: backup was done incrementally, reused 464.99 GiB (99.9%)
105: 2025-11-18 05:34:49 INFO: Uploaded backup catalog (22.747 MiB)
105: 2025-11-18 05:34:50 INFO: Duration: 13601.67s
105: 2025-11-18 05:34:50 INFO: End Time: Tue Nov 18 05:34:50 2025
105: 2025-11-18 05:34:50 INFO: adding notes to backup
105: 2025-11-18 05:34:51 INFO: cleanup temporary 'vzdump' snapshot
105: 2025-11-18 05:34:52 INFO: Finished Backup of VM 105 (03:48:27)
106: 2025-11-18 05:34:52 INFO: Starting Backup of VM 106 (lxc)
106: 2025-11-18 05:34:52 INFO: status = running
106: 2025-11-18 05:34:52 INFO: CT Name: database
106: 2025-11-18 05:34:52 INFO: including mount point rootfs ('/') in backup
106: 2025-11-18 05:34:52 INFO: backup mode: snapshot
106: 2025-11-18 05:34:52 INFO: ionice priority: 7
106: 2025-11-18 05:34:52 INFO: create storage snapshot 'vzdump'
106: 2025-11-18 05:34:52 INFO: creating Proxmox Backup Server archive 'ct/106/2025-11-18T04:34:52Z'
106: 2025-11-18 05:34:52 INFO: set max number of entries in memory for file-based backups to 1048576
106: 2025-11-18 05:34:52 INFO: run: lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- /usr/bin/proxmox-backup-client backup --crypt-mode=none pct.conf:/var/tmp/vzdumptmp1078781_106/etc/vzdump/pct.conf root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --skip-lost-and-found --exclude=/tmp/?* --exclude=/var/tmp/?* --exclude=/var/run/?*.pid --backup-type ct --backup-id 106 --backup-time 1763440492 --entries-max 1048576 --repository root@pam@XXX:backup-local
106: 2025-11-18 05:34:52 INFO: Starting backup: ct/106/2025-11-18T04:34:52Z
106: 2025-11-18 05:34:52 INFO: Client name: proxmox
106: 2025-11-18 05:34:52 INFO: Starting backup protocol: Tue Nov 18 05:34:52 2025
106: 2025-11-18 05:34:52 INFO: Downloading previous manifest (Mon Nov 17 06:35:36 2025)
106: 2025-11-18 05:34:52 INFO: Upload config file '/var/tmp/vzdumptmp1078781_106/etc/vzdump/pct.conf' to 'root@pam@XXX:8007:backup-local' as pct.conf.blob
106: 2025-11-18 05:34:52 INFO: Upload directory '/mnt/vzsnap0' to 'root@pam@XXX:8007:backup-local' as root.pxar.didx
106: 2025-11-18 05:35:11 INFO: root.pxar: had to backup 874.243 MiB of 5.107 GiB (compressed 205.425 MiB) in 19.30 s (average 45.289 MiB/s)
106: 2025-11-18 05:35:11 INFO: root.pxar: backup was done incrementally, reused 4.253 GiB (83.3%)
106: 2025-11-18 05:35:11 INFO: Uploaded backup catalog (1.229 MiB)
106: 2025-11-18 05:35:27 INFO: Duration: 35.19s
106: 2025-11-18 05:35:27 INFO: End Time: Tue Nov 18 05:35:27 2025
106: 2025-11-18 05:35:27 INFO: adding notes to backup
106: 2025-11-18 05:35:28 INFO: cleanup temporary 'vzdump' snapshot
106: 2025-11-18 05:35:28 INFO: Finished Backup of VM 106 (00:00:36)Thanks a lot for your help.
