Oracle : 8.0.5
Platform : Sun


Currently we have distributed_transactions set to 50. But sometime an OS 
user login and started quite a few sessions with transaction, so other user 
can not start an transaction.  So my questions are:

1. Is there any way to limit how many sessions from a particular OSUSER? If 
yes, how?

2. Is there a way to limit how many sessions from a particular machine 
(which uses db link to access out oracle db)? If yes, how?

I can get OSUSER and machine info from v$session.

Thanks.

-------------
SQL>  select name, value from v$parameter where 
name='distributed_transactions';

NAME
----------------------------------------------------------------
VALUE
--------------------------------------------------------------------------------
distributed_transactions
50
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