Summary:
changed the lag units in the graph --> now shows in "s" instead of "ms" -- otherwise, we see numbers like 40K ms.

changed  ops & MB --> to ops/s & MB/s

Test Plan: {F403669}

Reviewers: vbansal, sumukh.phalgaonkar

Reviewed By: vbansal, sumukh.phalgaonkar

Subscribers: yugaware

Differential Revision: https://phorge.dev.yugabyte.com/D47321