If I understand things correctly if using only one mongrel instance then if you get a request that takes a while (like a shopper in line with a large amount of goods) Then the other requests have to wait in line for the first to finish. So running another mongrel instance opens another "line for customers to be serviced."
We have a team of around 10 frequently accessing the site mongrel is serving.
Is there a downside of running 10 mongrel instances? For practical purposes what would be a good amount for 10 frequent users?
This is being proxied through Apache (SSL) via a load balancer.