I have two micro services where one write to DB and another read from DB.

The first micro service is written in C++ while the other is written in NodeJS.

When querying for data say for a IP the MongoDB return older data or no data at all (In case if the client is new) but If I query like say after 5 min it returns the recent data.

await Sessions.find({ ip: ip}).sort({ receive_time: -1 }).lean().limit(1).exec();

Every record on DB has a field called receive_time which I used to store 64 bit timestamp 

I don't think this has to do with concurrency at all because C++ is performant enough to write to DB faster

Worth noting, The database is in a separate server.

If it possible to disable cache, please tell me how, I'd disable it completely.