System wide Lock timeout

Question

Hi,
I'd like to set a system wide lock timeout to 10 secs, i est I want that if a transaction waits for a row more than 10 seconds, the Oracle forces a ROLLBACK!
Looking in the documentation I found the trigger:
CREATE OR REPLACE TRIGGER resumable_default_timeout AFTER SUSPEND ON DATABASE BEGIN DBMS_RESUMABLE.SET_TIMEOUT(10); END;
... but it seems not to work.
Is there any system wide parameter, or another trigger, or I missed something with the above trigger (I shutdown any session to test)!
thank you
G.

Answer 1

Steve,
your answer is complete, the problem I am facing is that:
1 - I should instruct my programmers of the usabily of this tecnique the SELECT ... FOR UPDATE WAIT n, so the timeout is faced from application perspective, and it isn't so bad, in fact every single query could be customized regarding the WAIT time!
The drawback is that if the programmer doesn't use this technique, the application waits for the eternity.
2 - A system wide lock timeout, in any case could force, in any case, a default behaviour, ...
3 - If you are doing a porting from a different RDBMS see DB2, that implements a db lock timeout, you should recode all the SQL, and the porting needs more review and testing of the application!
Thank you
very much
G.