You may want to disable:
DEBUG_SEGMENT_WRITING = false //Debugs correctness of writing of segments (costs server performance)
as this creates a catalogue of previous written segments, which would be used to restore chunks if a chunk is corrupted on load.
This is more an ancient function that was required for huge objects in mid/end 2014 where chunks randomly flipped blocks to other things or were missing forever. This function does not yield any benefits any more, its left in, IF they come back so we can turn this on again.
But the disk usage is really high with that on.
FORCE_DISK_WRITE_COMPLETION = false //forces writing operations of raw data to disk directly after operation. For some OS this prevents raw data corruption
This may be an option you want to enable, IF you have issues with reverting ship states, or problems with saving in single-player. (Sometimes new ships do not get saved at all, and revert to a marker without any block and then vanish shortly after, however this only affects a few combinations of systems, and the cause is most likely not Java)
- Andy