Comment # 12 on bug 1032027 from Sekhemty -

I've reported a similar issue on the forums:

https://forums.opensuse.org/showthread.php/537591-btrfs-transacti-heavy-disk-usage

I'm on Tumbleweed,[btrfs-transacti] has an heavy disk I/O and write usage.

This usage seems to be constant, and renders the system unresponsive even for
many minutes.