i am newbie …
it’s true datasize-workingset ?
if the data size is 100 GB, do you have to allocate 1OO GB RAM + Indexes size?

Hey @Norhisham_Mohd_Nor,

Welcome to the MongoDB Community forums :sparkles:

If your data size is 100 GB, you typically won’t need 100 GB of RAM plus additional space for indexes. The amount of RAM needed depends on factors like how much of the data is actively accessed, the efficiency of caching strategies, and the specific requirements of your database system. It’s advisable to test and monitor performance to determine the optimal RAM allocation for your specific use case.

Also, you can also read a similar thread here: How to analyze MongoDB RAM usage

In case of further questions or concerns, please feel free to reach out!

Best regards,