To know the space occupied by index and data respectively in elasticsearch

How to find out how much space is occupied by my data and indices respectively in elasticsearch? I want to know the proportion of data:indices. How can i find out that?

There are a couple stats end points:

not sure if this has the exact information you are looking for.

What's the reason why you are looking for this information?

Thanks mainec. Actually i wanted to know how much space is actually being occupied by my data so that i can find out how much extra storage is being spent for indices so that i can understand the efficiency of elasticsearch.