How do I find the high water mark (for sessions) on Oracle 9i

Question

How can I find the high water mark (the historical maximum number of concurrent users) in an oracle database (9i).

Solution 1

This should do the trick:

SELECT sessions_highwater FROM v$license;

Solution 2

select max_utilization from v$resource_limit where resource_name = 'sessions';

A good overview of Oracle system views can be found here.