Neal
May 16, 2025, 7:21pm
1
I’m getting a few btrfs applications that seem to run pretty often, about every hour or so, and peg my cpu or at least some of it’s cores at 99% which makes my computer completely unresponsive for about 10sec until it stops and goes away. I’ve seen btrfs “clean” also do it but “group rescan” seems to be the most frequent culprit.
I’m running TW and it’s up to date…dup yesterday.
I’m not sure if this has anything to do with it but for transparency I did recently upgrade my drive from a SSD to a larger NVME. I used clonezilla and it went perfectly; then I used gparted and expanded the root partition which also extended the FS automatically for me since it has built in btrfs tools. It all went well, the space is there. Smart also reports the nvme being healthy and no errors
Anybody else experience this?
1 Like
Neal
May 17, 2025, 11:19pm
3
arvidjaar:
snapper get-config
Here is the output.
sudo snapper get-config
[sudo] password for root:
Key │ Value
───────────────────────┼──────
ALLOW_GROUPS │
ALLOW_USERS │
BACKGROUND_COMPARISON │ yes
EMPTY_PRE_POST_CLEANUP │ yes
EMPTY_PRE_POST_MIN_AGE │ 1800
FREE_LIMIT │ 0.2
FSTYPE │ btrfs
NUMBER_CLEANUP │ yes
NUMBER_LIMIT │ 2-10
NUMBER_LIMIT_IMPORTANT │ 4-10
NUMBER_MIN_AGE │ 1800
QGROUP │ 1/0
SPACE_LIMIT │ 0.5
SUBVOLUME │ /
SYNC_ACL │ no
TIMELINE_CLEANUP │ yes
TIMELINE_CREATE │ no
TIMELINE_LIMIT_DAILY │ 10
TIMELINE_LIMIT_HOURLY │ 10
TIMELINE_LIMIT_MONTHLY │ 10
TIMELINE_LIMIT_WEEKLY │ 0
TIMELINE_LIMIT_YEARLY │ 10
TIMELINE_MIN_AGE │ 1800
How many snapshots do you have? How full is the filesystem? Show
btrfs qgroup show /
snapper list
Neal
May 18, 2025, 3:57pm
5
arvidjaar:
snapper list
sudo btrfs qgroup show /
[sudo] password for root:
Qgroupid Referenced Exclusive Path
-------- ---------- --------- ----
0/5 16.00KiB 16.00KiB <toplevel>
0/256 16.00KiB 16.00KiB @
0/257 44.07GiB 44.07GiB @/var
0/258 7.02MiB 248.00KiB @/usr/local
0/259 10.41MiB 10.41MiB @/tmp
0/260 50.82MiB 50.82MiB @/srv
0/261 40.52MiB 40.52MiB @/root
0/262 363.80MiB 363.74MiB @/opt
0/263 344.14GiB 344.13GiB @/home
0/264 4.33MiB 4.33MiB @/boot/grub2/x86_64-efi
0/265 16.00KiB 16.00KiB @/boot/grub2/i386-pc
0/266 1.29MiB 1.29MiB @/.snapshots
0/340 16.00KiB 16.00KiB @/var/lib/machines
0/1741 11.38GiB 1.17GiB @/.snapshots/794/snapshot
0/1827 11.38GiB 1.06GiB @/.snapshots/805/snapshot
0/1833 11.52GiB 358.36MiB @/.snapshots/808/snapshot
0/1843 11.72GiB 6.55MiB @/.snapshots/815/snapshot
0/1847 11.72GiB 33.52MiB @/.snapshots/817/snapshot
0/1850 11.62GiB 396.74MiB @/.snapshots/820/snapshot
0/2037 11.90GiB 488.68MiB @/.snapshots/951/snapshot
0/2047 11.91GiB 5.79GiB @/.snapshots/954/snapshot
0/2056 12.04GiB 408.44MiB @/.snapshots/958/snapshot
0/2088 12.45GiB 605.81MiB @/.snapshots/972/snapshot
0/2116 12.33GiB 698.49MiB @/.snapshots/987/snapshot
0/2154 12.99GiB 6.23GiB @/.snapshots/1014/snapshot
0/2158 12.79GiB 38.66MiB @/.snapshots/1018/snapshot
0/2164 12.46GiB 21.24MiB @/.snapshots/1024/snapshot
0/2167 12.79GiB 26.56MiB @/.snapshots/1025/snapshot
0/2171 13.17GiB 246.57MiB @/.snapshots/1029/snapshot
0/2172 13.35GiB 554.26MiB @/.snapshots/1030/snapshot
0/2234 12.23GiB 1.92GiB @/.snapshots/1069/snapshot
0/2249 12.55GiB 1.72GiB @/.snapshots/1084/snapshot
0/2258 12.70GiB 5.39GiB @/.snapshots/1093/snapshot
0/2274 11.98GiB 5.47GiB @/.snapshots/1107/snapshot
0/2292 11.94GiB 3.81GiB @/.snapshots/1114/snapshot
0/2299 11.62GiB 3.29GiB @/.snapshots/1119/snapshot
0/2332 11.98GiB 3.29GiB @/.snapshots/1141/snapshot
0/2344 12.19GiB 2.34GiB @/.snapshots/1146/snapshot
0/2362 12.30GiB 4.02MiB @/.snapshots/1151/snapshot
0/2370 12.30GiB 3.67MiB @/.snapshots/1159/snapshot
0/2374 12.42GiB 5.12MiB @/.snapshots/1160/snapshot
0/2375 12.42GiB 2.47MiB @/.snapshots/1161/snapshot
0/2376 12.11GiB 75.97MiB @/.snapshots/1162/snapshot
0/2387 12.13GiB 1.58MiB @/.snapshots/1169/snapshot
0/2389 12.13GiB 544.00KiB @/.snapshots/1171/snapshot
0/2391 12.48GiB 156.91MiB @/.snapshots/1172/snapshot
0/2658 12.36GiB 576.00KiB @/.snapshots/1189/snapshot
0/2659 12.37GiB 320.00KiB @/.snapshots/1190/snapshot
0/2665 12.37GiB 820.00KiB @/.snapshots/1191/snapshot
0/2666 12.37GiB 112.00KiB @/.snapshots/1192/snapshot
0/2667 12.40GiB 128.00KiB @/.snapshots/1193/snapshot
0/2668 12.40GiB 148.00KiB @/.snapshots/1194/snapshot
0/2670 12.40GiB 30.36MiB @/.snapshots/1195/snapshot
0/2673 12.66GiB 5.61MiB @/.snapshots/1196/snapshot
0/2674 12.66GiB 2.28MiB @/.snapshots/1197/snapshot
0/2676 12.46GiB 5.09MiB @/.snapshots/1198/snapshot
1/0 22.69GiB 1.34GiB <0 member qgroups>
255/340 16.00KiB 16.00KiB <0 member qgroups>
sudo snapper list
# │ Type │ Pre # │ Date │ User │ Used Space │ Cleanup │ Description │ Userdata
──────┼────────┼───────┼─────────────────────────────────┼──────┼────────────┼─────────┼───────────────────────────────┼──────────────
0 │ single │ │ │ root │ │ │ current │
794 │ single │ │ Thu 24 Aug 2023 03:02:30 PM CDT │ root │ 1.17 GiB │ │ 8-24-23 │
805 │ single │ │ Sat 07 Oct 2023 02:06:18 PM CDT │ root │ 1.06 GiB │ │ 10-7-23 │
808 │ single │ │ Sat 07 Oct 2023 02:59:37 PM CDT │ root │ 358.36 MiB │ │ 10-7-23.before-kernel │
815 │ single │ │ Sat 07 Oct 2023 04:49:53 PM CDT │ root │ 6.55 MiB │ │ 10-7-23.new.kernel │
817 │ single │ │ Sat 14 Oct 2023 12:44:02 PM CDT │ root │ 33.52 MiB │ │ 10-14-23 │
820 │ single │ │ Sat 14 Oct 2023 01:37:37 PM CDT │ root │ 396.74 MiB │ │ 10-14-23.bk │
951 │ single │ │ Mon 15 Jan 2024 01:33:33 PM CST │ root │ 488.68 MiB │ │ 1-15-24 │
954 │ single │ │ Sat 02 Mar 2024 12:45:22 PM CST │ root │ 5.79 GiB │ │ 3-2-24 │
958 │ single │ │ Sat 02 Mar 2024 10:26:46 PM CST │ root │ 408.44 MiB │ │ 3-2-24.pre-kernel │
972 │ single │ │ Sat 13 Apr 2024 04:48:07 PM CDT │ root │ 605.81 MiB │ │ 4-13-24.pre-kernel │
987 │ single │ │ Tue 18 Jun 2024 12:26:27 PM CDT │ root │ 698.49 MiB │ │ 6-18-24.pre-kernel │
df -h
Filesystem Size Used Avail Use% Mounted on
/dev/nvme0n1p3 926G 508G 414G 56% /
devtmpfs 4.0M 12K 4.0M 1% /dev
tmpfs 16G 6.2M 16G 1% /dev/shm
tmpfs 6.3G 2.1M 6.3G 1% /run
efivarfs 150K 83K 63K 58% /sys/firmware/efi/efivars
tmpfs 1.0M 0 1.0M 0% /run/credentials/systemd-journald.service
/dev/nvme0n1p3 926G 508G 414G 56% /.snapshots
/dev/nvme0n1p3 926G 508G 414G 56% /boot/grub2/i386-pc
/dev/nvme0n1p3 926G 508G 414G 56% /boot/grub2/x86_64-efi
/dev/nvme0n1p3 926G 508G 414G 56% /home
/dev/nvme0n1p3 926G 508G 414G 56% /opt
/dev/nvme0n1p3 926G 508G 414G 56% /root
/dev/nvme0n1p3 926G 508G 414G 56% /srv
/dev/nvme0n1p3 926G 508G 414G 56% /tmp
/dev/nvme0n1p3 926G 508G 414G 56% /usr/local
/dev/nvme0n1p3 926G 508G 414G 56% /var
/dev/nvme0n1p1 500M 6.1M 494M 2% /boot/efi
/dev/loop0 128K 128K 0 100% /snap/bare/5
/dev/loop1 22M 22M 0 100% /snap/bashtop/501
/dev/loop2 22M 22M 0 100% /snap/bashtop/504
/dev/loop3 384K 384K 0 100% /snap/bpytop/279
/dev/loop4 384K 384K 0 100% /snap/bpytop/284
/dev/loop6 185M 185M 0 100% /snap/brave/507
/dev/loop7 1.8M 1.8M 0 100% /snap/btop/836
/dev/loop8 1.9M 1.9M 0 100% /snap/btop/845
/dev/loop12 56M 56M 0 100% /snap/core18/2855
/dev/loop13 64M 64M 0 100% /snap/core20/2501
/dev/loop10 105M 105M 0 100% /snap/core/17200
/dev/loop16 74M 74M 0 100% /snap/core22/1963
/dev/loop17 67M 67M 0 100% /snap/core24/739
/dev/loop11 56M 56M 0 100% /snap/core18/2846
/dev/loop18 67M 67M 0 100% /snap/core24/888
/dev/loop19 69M 69M 0 100% /snap/cups/1085
/dev/loop15 64M 64M 0 100% /snap/core20/2571
/dev/loop14 74M 74M 0 100% /snap/core22/1908
/dev/loop20 68M 68M 0 100% /snap/cups/1100
/dev/loop21 172M 172M 0 100% /snap/element-desktop/146
/dev/loop23 2.0M 2.0M 0 100% /snap/fast/4
/dev/loop24 165M 165M 0 100% /snap/gnome-3-28-1804/194
/dev/loop25 165M 165M 0 100% /snap/gnome-3-28-1804/198
/dev/loop26 219M 219M 0 100% /snap/gnome-3-34-1804/90
/dev/loop27 219M 219M 0 100% /snap/gnome-3-34-1804/93
/dev/loop28 506M 506M 0 100% /snap/gnome-42-2204/176
/dev/loop29 517M 517M 0 100% /snap/gnome-42-2204/202
/dev/loop32 405M 405M 0 100% /snap/gnome-46-2404/90
/dev/loop31 82M 82M 0 100% /snap/gtk-common-themes/1534
/dev/loop33 92M 92M 0 100% /snap/gtk-common-themes/1535
/dev/loop34 126M 126M 0 100% /snap/iptvnator/90
/dev/loop35 119M 119M 0 100% /snap/iptvnator/92
/dev/loop36 172M 172M 0 100% /snap/mailspring/548
/dev/loop30 405M 405M 0 100% /snap/gnome-46-2404/77
/dev/loop38 212M 212M 0 100% /snap/mesa-2404/143
/dev/loop37 172M 172M 0 100% /snap/mailspring/549
/dev/loop39 208M 208M 0 100% /snap/mesa-2404/495
/dev/loop40 45M 45M 0 100% /snap/snapd/23771
/dev/loop41 51M 51M 0 100% /snap/snapd/24505
tmpfs 1.0M 0 1.0M 0% /run/credentials/getty@tty1.service
tmpfs 3.2G 4.1M 3.2G 1% /run/user/1000
/dev/loop42 105M 105M 0 100% /snap/core/17210
/dev/loop9 172M 172M 0 100% /snap/element-desktop/148
/dev/loop22 185M 185M 0 100% /snap/brave/511
neal@localhost:~>