Hello
we are currently investigating performance issue on system runing
above btrs filesystem. Is it possible, that performance is impacted by
lack of free space? Also, how to get info about real free space on btrfs
volume?
# btrfs-show /dev/sdb1
Label: opt uuid: 28a55827-e677-47a9-98d5-d31eb3d71436
Total devices 1 FS bytes used 167.83GB
devid 1 size 240.00GB used *229.25GB* path /dev/sdb1
Btrfs Btrfs v0.19
# btrfs filesystem df /opt
Data: total=213.23GB, used=165.26GB
System, DUP: total=8.00MB, used=40.00KB
System: total=4.00MB, used=0.00
Metadata, DUP: total=8.00GB, used=2.57GB
# df -h /opt
Filesystem Size Used Avail Use% Mounted on
/dev/sdb1 240G 171G 59G 75% /opt
How come that there is difference detween btrfs-show and df .. 40GB Is
the space really usead or can I claim it back? (there are no snapshots)
# btrfs subvolume list /opt
#
Thanks
michal
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