Starting the storage engine wiredTiger failed when installing 3.0

  mongodb, question

Does anyone have the same problem?
I operate according to the data-based tutorial.
Update /etc/mongod.conf
Add storageEngine=wiredTiger
At the same time, dbpath =/var/lib/mongo-wired tiger is modified.

However, mongoDB cannot be enabled after modification, and the settings can be used again after being changed back.
Can only the default mmapv1 be used?

Can’t start up or hang up after a period of operation? If this is the latter case, it may be caused by too little memory.