ram usage

Limitations of indexes in MongoDB
each index not only occupies part of the memory space but also causes an overhead on each insert, update, and delete operation. so, if you rarely use your collection for read operations, you should not use the index for it.
All things about RAM laptop and what you need to know
what is ram? why is ram so important to laptops? how much ram does a laptop need? are there any types of ram you can use? and how to use ram to achieve the highest efficiency?