Actual RAM usage vs. Memory Mapped

Hello,
First of all, very handy tool. Thanks!
I'm using mmap to read some giant files and Psrecord shows the file size as a part of memory usage report. Is there a way to make it only the actual RAM usage? What I care about is the RAM usage so I can provision enough memory for the kubernetes resources that run the code.
Thanks

Start by locating psrecord's memory-reporting implementation and reproduce the reported behavior with a process that reads a large file through mmap. Determine how mapped file size is currently measured versus resident RAM, then verify that the report reflects the requested memory metric and remains useful for Kubernetes resource sizing.

Written by the indexing model from the issue text.