How to measure the size of data my druid cluster can process in given amount of time?

I want to perform capacity planning for my Druid cluster where I need to calculate throughput .
I am not sure how to get these statistics. If anyone is aware about it please let me know.
Thanks in advance slightly_smiling_face:

Welcome @Nikita! Sorry for the long delay in replying, but many of us were offsite.

Can you share a bit about your use case?