Daniel Pecka changed bug 1063638
What Removed Added
CC   nettezzaumanaa@gmail.com

Comment # 84 on bug 1063638 from 
it makes system unresponsive at all for couple of minutes ... here with fast
ssd just 7 minutes ... it's crazy ..


I've observed on servers a HA app doing switchover every times this takes a
place .. we need to get rid of it


# journalctl -b 0 -u btrfs\*
-- Logs begin at Mon 2018-07-02 20:55:02 CEST, end at Mon 2018-07-02 21:11:01
CEST. --
Jul 02 20:55:16 linux-1b6m systemd[1]: Started Scrub btrfs filesystem, verify
block checksums.
Jul 02 20:55:16 linux-1b6m systemd[1]: Started Watch
/etc/sysconfig/btrfsmaintenance.
Jul 02 20:55:16 linux-1b6m systemd[1]: Started Balance block groups on a btrfs
filesystem.
Jul 02 20:55:16 linux-1b6m systemd[1]: Starting Update cron periods from
/etc/sysconfig/btrfsmaintenance...
Jul 02 20:55:16 linux-1b6m btrfsmaintenance-refresh-cron.sh[1678]: Refresh
script btrfs-scrub.sh for uninstall
Jul 02 20:55:16 linux-1b6m btrfsmaintenance-refresh-cron.sh[1678]: Refresh
script btrfs-defrag.sh for uninstall
Jul 02 20:55:16 linux-1b6m btrfsmaintenance-refresh-cron.sh[1678]: Refresh
script btrfs-balance.sh for uninstall
Jul 02 20:55:16 linux-1b6m btrfsmaintenance-refresh-cron.sh[1678]: Refresh
script btrfs-trim.sh for uninstall
Jul 02 20:55:16 linux-1b6m btrfsmaintenance-refresh-cron.sh[1678]: Refresh
timer btrfs-scrub for monthly
Jul 02 20:55:16 linux-1b6m btrfsmaintenance-refresh-cron.sh[1678]: Refresh
timer btrfs-defrag for none
Jul 02 20:55:17 linux-1b6m btrfsmaintenance-refresh-cron.sh[1678]: Refresh
timer btrfs-balance for weekly
Jul 02 20:55:17 linux-1b6m systemd[1]: Started Balance block groups on a btrfs
filesystem.
Jul 02 20:55:17 linux-1b6m btrfsmaintenance-refresh-cron.sh[1678]: Refresh
timer btrfs-trim for none
Jul 02 20:55:17 linux-1b6m btrfs-balance.sh[1888]: Before balance of /
Jul 02 20:55:17 linux-1b6m btrfs-balance.sh[1888]: Data, single:
total=15.01GiB, used=12.50GiB
Jul 02 20:55:17 linux-1b6m btrfs-balance.sh[1888]: System, single:
total=32.00MiB, used=16.00KiB
Jul 02 20:55:17 linux-1b6m btrfs-balance.sh[1888]: Metadata, single:
total=1.01GiB, used=745.58MiB
Jul 02 20:55:17 linux-1b6m btrfs-balance.sh[1888]: GlobalReserve, single:
total=44.00MiB, used=0.00B
Jul 02 20:55:17 linux-1b6m btrfs-balance.sh[1888]: Filesystem              Size
 Used Avail Use% Mounted on
Jul 02 20:55:17 linux-1b6m btrfs-balance.sh[1888]: /dev/mapper/rpool-root   33G
  15G   18G  45% /
Jul 02 20:55:17 linux-1b6m systemd[1]: Started Update cron periods from
/etc/sysconfig/btrfsmaintenance.
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 0 out
of 22 chunks
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]: Dumping filters: flags 0x1,
state 0x0, force is off
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]:   DATA (flags 0x2):
balancing, usage=1
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 0 out
of 22 chunks
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]: Dumping filters: flags 0x1,
state 0x0, force is off
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]:   DATA (flags 0x2):
balancing, usage=5
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 0 out
of 22 chunks
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]: Dumping filters: flags 0x1,
state 0x0, force is off
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]:   DATA (flags 0x2):
balancing, usage=10
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 0 out
of 22 chunks
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]: Dumping filters: flags 0x1,
state 0x0, force is off
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]:   DATA (flags 0x2):
balancing, usage=20
Jul 02 20:55:19 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 0 out
of 22 chunks
Jul 02 20:56:47 linux-1b6m btrfs-balance.sh[1888]: Dumping filters: flags 0x1,
state 0x0, force is off
Jul 02 20:56:47 linux-1b6m btrfs-balance.sh[1888]:   DATA (flags 0x2):
balancing, usage=30
Jul 02 20:56:47 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 1 out
of 22 chunks
Jul 02 20:57:29 linux-1b6m btrfs-balance.sh[1888]: Dumping filters: flags 0x1,
state 0x0, force is off
Jul 02 20:57:29 linux-1b6m btrfs-balance.sh[1888]:   DATA (flags 0x2):
balancing, usage=40
Jul 02 20:57:29 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 1 out
of 22 chunks
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]: Dumping filters: flags 0x1,
state 0x0, force is off
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]:   DATA (flags 0x2):
balancing, usage=50
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 1 out
of 22 chunks
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 0 out
of 22 chunks
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]: Dumping filters: flags 0x6,
state 0x0, force is off
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]:   METADATA (flags 0x2):
balancing, usage=1
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]:   SYSTEM (flags 0x2):
balancing, usage=1
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 1 out
of 22 chunks
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]: Dumping filters: flags 0x6,
state 0x0, force is off
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]:   METADATA (flags 0x2):
balancing, usage=5
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]:   SYSTEM (flags 0x2):
balancing, usage=5
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 1 out
of 22 chunks
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]: Dumping filters: flags 0x6,
state 0x0, force is off
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]:   METADATA (flags 0x2):
balancing, usage=10
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]:   SYSTEM (flags 0x2):
balancing, usage=10
Jul 02 20:58:10 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 1 out
of 22 chunks
Jul 02 20:58:11 linux-1b6m btrfs-balance.sh[1888]: Dumping filters: flags 0x6,
state 0x0, force is off
Jul 02 20:58:11 linux-1b6m btrfs-balance.sh[1888]:   METADATA (flags 0x2):
balancing, usage=20
Jul 02 20:58:11 linux-1b6m btrfs-balance.sh[1888]:   SYSTEM (flags 0x2):
balancing, usage=20
Jul 02 20:58:11 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 1 out
of 22 chunks
Jul 02 21:02:26 linux-1b6m btrfs-balance.sh[1888]: Dumping filters: flags 0x6,
state 0x0, force is off
Jul 02 21:02:26 linux-1b6m btrfs-balance.sh[1888]:   METADATA (flags 0x2):
balancing, usage=30
Jul 02 21:02:26 linux-1b6m btrfs-balance.sh[1888]:   SYSTEM (flags 0x2):
balancing, usage=30
Jul 02 21:02:26 linux-1b6m btrfs-balance.sh[1888]: Done, had to relocate 2 out
of 22 chunks
Jul 02 21:02:26 linux-1b6m btrfs-balance.sh[1888]: After balance of /
Jul 02 21:02:26 linux-1b6m btrfs-balance.sh[1888]: Data, single:
total=15.01GiB, used=12.50GiB
Jul 02 21:02:26 linux-1b6m btrfs-balance.sh[1888]: System, single:
total=32.00MiB, used=16.00KiB
Jul 02 21:02:26 linux-1b6m btrfs-balance.sh[1888]: Metadata, single:
total=1.01GiB, used=746.77MiB
Jul 02 21:02:26 linux-1b6m btrfs-balance.sh[1888]: GlobalReserve, single:
total=44.50MiB, used=0.00B
Jul 02 21:02:26 linux-1b6m btrfs-balance.sh[1888]: Filesystem              Size
 Used Avail Use% Mounted on
Jul 02 21:02:26 linux-1b6m btrfs-balance.sh[1888]: /dev/mapper/rpool-root   33G
  15G   18G  45% /

regards, daniel

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