How many connections (Max.) can be kept in a pool..?

Question

How does connection pooling works? i want to know that if i set max. pool size = 20 so are only 20 users able to connect to the web app. at a same time and make a transaction ? What happens to the large websites like Amazon where thousands of users log in at same time throughout the world i.e what pool size do they keep? i am not getting the core concept. I know that a connection pool keeps open connections and users reuse the open connections but i want my first question to be answered.

Answer 1

There is no such document where you can find the maximum size of the pool.Default value of max pool size is 100

Check out MSDN

Answer 2

There can be maximum 32767 connections to the database at a time. That is, at a single point of time only 32767 users can make transactions to database via web app. Not even one more than that. A pool size is not mentioned anywhere only default is there(100). But SQL Server will only accept 32767 connections from user. Proof: Select @@MAX_CONNECTIONS . If misunderstood please correct me.