"Smith, Ron L." wrote:
>
> We have been asked to gather statistics on the number of clients using
> Oracle. This is being done to determine if we have sufficient licensing.
> We have about 100 instances to monitor.
>
> Has anyone done this? Any ideas on what "Concurrent users" might mean to
> the majority of people?
>
> We have both Oracle 7 and Oracle 8.
>
> Ron Smith
> DBA
> Kerr-McGee Corp
>
Well, I have just been working on this for one of my customers last
week. The obvious thing is to query V$SESSION at regular intervals
(dbms_job can help) and what you can do is store the result through a
database link to a single instance. Where it was tricky was that we
wanted to identify 'system' processes (easy, except that job processes
are marked as 'USER', which is debatable), and (that's where the snag
is) processes which are the results of a connection through a database
link. The logic is that a database link is initiated by a 'normal'
connection - for which the full-blown licence is already paid. So they
should not exactly count as much as regular connection; and if this is
not a good argument, then it is probably possible to reduce their number
by shifting around applications. Ultimately we could apply Larry's
favorite concept of 'single instance' (anyway I have always found DB
links messy).
My trouble was that nothing, but human knowledge, can tell whether the
connection comes from a database link or is genuine (if somebody has a
way, please share !). All the user information (machine, program,
module, action ...) comes from the initial connection and is propagated.
I have solved this (not fully satisfactorily) by having a table
automatically inserted with unknown (machine, program) pairs and
manually updated to say 'If we see this program on this database, then
it comes from a database link' - or 'anything coming from this machine
must come from a database link'. Added something for connection from
HTTP servers, although I doubt that those will be spontaneously
discussed during the negotiation.
--
Regards,
Stephane Faroult
Oriole Ltd
--
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Author: Stephane Faroult
INET: sfaroult_at_oriole.com
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Received on Tue Feb 19 2002 - 14:40:33 CST
