Importance of db.Close()

[rendaw]

Is db.Close() optional? My main concern is if panic could lead to a corrupt database.

[LuciferMS]

I think is better to call db.Close function to close db. Because it is better to release the resource which is leveldb using, such as filelock, writer and reader of database file.I know what you're worried about.Don't worry, calling the close method will not cause problems with the database. The data in memory will be written to disk by WAL logging, and if you call the OpenDB method again with the same path, the data in memory will be restored to memory by reading the log.