Mongodb删除数据库后为什么数据文件还存在？

Question

Mongodb删除数据库后为什么数据文件还存在？

循环插入了1kw条数据。然后在rockmongo中删除了这个数据库。但是数据目录还是有一堆文件存在，而且还不小。

Answer 1

After deleting the database, there is still pre-allocated space on the disk, so you need to execute:

db.repairDatabase()

PS: It is not recommended to use it in an online environment, as it may cause excessive load and service interruption.