In general there could be various things that build up over time causing disk to increase in space. For example, during compactions, you can expect upto 2-3x normal disk usage to do compaction. Dgraph also stores some histories, which might be increasing the disk space. If it would be possible, can you give us the expanded p directory, I can take a look to figure out why the disk space is high. We can then optimize the parameters for you.