Concurrency supported?

Hiya,

how good is concurrency supported in the JDBC driver? For example, if
I have a small process with about 50 threads, some of them requesting
large objects, will one JDBC connection suffice? If one thread is
executing a large select which takes seconds to execute, will other
threads be able to still get their results in time or do they have to
wait?

In general, are there concurrency limitations in the protocol
PostgreSQL uses?

Regards

--
    Ingo Luetkebohle / ingo@blank.pages.de / 95428014
/
| Student of Computational Linguistics & Computer Science;
| Fargonauten.DE sysadmin; Gimp Registry maintainer;
| FP: 3187 4DEC 47E6 1B1E 6F4F  57D4 CD90 C164 34AD CE5B

----- End forwarded message -----

--
    Ingo Luetkebohle / ingo@blank.pages.de / 95428014
/
| Student of Computational Linguistics & Computer Science;
| Fargonauten.DE sysadmin; Gimp Registry maintainer;
| FP: 3187 4DEC 47E6 1B1E 6F4F  57D4 CD90 C164 34AD CE5B