Running 2 select statements concurrently

[jockodundee]

Is it strange that when I run multiple select statements concurrently, each statement has to wait until the first one finishes.
For instance, if I start a query that takes 10 minutes, then I start a query that should run instantly, the instant query wont finish until the 10 minute query does.

[WhiteRider]

Are you doing this in PGAdmin?
As I understand it, postgres isn't multi-threaded so won't do two things concurrently.