connection pools

Each connection pool is associated with a distinct connection string. When a new connection is opened, if the connection string is
not an exact match to an existing pool, a new pool is created. Connections are pooled per process, per application domain, per
connection string, and, when using integrated security, per Windows identity. In this case, the connections are configured to use
integrated security. Each user has a discrete Windows identity resulting in the creation of a connection that is pooled separately.
There is one connection per connection pool.