@CodeSatori
based on your calculation and my conclusion regarding performance hog it doesn't matter if you have a few hundreds of members what matter most when they logged in or online at any given time. for example :

100,000 members with 10 users online at any given time VERSUS 500 members with 100 users online at any given time.

so basically online users eat more resources like you said "95 queries per second" and now the big question is how do we reduce that 95 queries or what see more do we need to add on the server to handle such large number of queries??