Strange error concerning graceful exit, while not graceful exiting

[Alexey]

Perhaps there are some relations between the disk speed and the size of the database, see

ERROR lazyfilewalker.gc-filewalker.subprocess failed to save progress in the database

In the hopes that this is true, allow me to give a bit more detail on what I have been experiencing for months now (this locking issue was affecting me even when my node was only around 3TB, rather than the 12+TB it is at now). Right now, piece_expiration.db seems to be roughly 12x or so the size of bandwidth.db. I think the difference was considerably less when my node was much smaller. That shifting size difference roughly corresponds to how often it would pick one database or the other to…