MongoDB In-Memory Storage engine

Question

We are currently using the Wired Tiger storage engine with MongoDB 3.2 We have tweaked a server (196Go RAM, disable journal) in order to use mongodb as a cache server (no replication, write concern = 0 for fire & forget writes).

I'd like to know if it could be interesting for us to switch to the In Memory storage engine knowing that our data already fits in memory. Is there another benefits?

Thank you

Answer 1

As you have already disabled journaling and the data fits your memory, switching to In-memory storage engine makes more sense as it provides the performance benefits that comes with the engine. Just make sure that writeConcernMajorityJournalDefault to false, not sure if write concern=0 servers the same purpose during write ACKs.