Great news. I hope we hear more about pluggable storage engine soon though. RocksDB support will be just perfect.
We are on our way! Plan to release RocksDB implementation with a next alpha end of this month...
Thanks. We're going to production soon with ArangoDB. We have tested 3.1.17, and 3.2 Alpha. 3.2 Alpha seems to be much more efficient with RAM. Would love to know more about what changed in this area.
We had to implement some preparations for the new storage engine in 3.1 which included changes in the WriteAheadLog. E.g. this consumed additional RAM. With 3.2 the memory needs are much lower as we put in some additional improvements.