Odoo Configuration calculation - limit-request

Was configuring odoo-15 for a 4GB server.

4 * ((0.8150) + (0.21024)) ~= 1.3GB(Allocating less than 50% system RAM for odoo)

[options]limit_memory_hard = 1073741824limit_memory_soft = 629145600limit_time_cpu = 600limit_time_real = 1200max_cron_threads = 1workers = 4

Now, looking at official documentation which they have done as example for 8GB

[options]limit_memory_hard = 1677721600limit_memory_soft = 629145600limit_request = 8192limit_time_cpu = 600limit_time_real = 1200max_cron_threads = 1workers = 8

My question: how limit_request is calculated ? And what is the role of it in server configuration? The application is e-commerce based with max of 10 concurrent users.Also, if my other config is not okay for 4GB, let me know that too :) Thanks.