2007/10/27, Camilo Porto <camiloporto@hotmail.com>:
> The parallelism happens even if my PC has only one processor?
PostgreSQL creates a separate process for each client connection -
whether you have one CPU or more.
> Each query is executed in a separeted Thread?
No threads, at least on Unix. Regular processes (sometimes called backends).
> I am simulating only 1 client with the Benchmark. Can 1 Client submit
> parallel queries, in single-processor enviroment?
If this client uses two connections, you can run two queries in paralell.
this chapter of documentation can be helpful:
http://www.postgresql.org/docs/8.2/static/overview.html