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Home -> Community -> Mailing Lists -> Oracle-L -> Re: How to restrict the user connections
Alan did you see, the previous example?
And any way you should read this
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96521/create.htm#999110
Setting License Parameters
Note:
Oracle no longer offers licensing by the number of concurrent sessions.
Therefore the LICENSE_MAX_SESSIONS and LICENSE_SESSIONS_WARNING
initialization parameters have been deprecated and are no longer discussed
in this book.
The point is, and is my opinion, if he want to control de number of concurrent users, he will have to create a login trigger, the second chance is use LICENSE_MAX_USERS, but what happens if he have 20 licenses and 40 users, and only 20 working at the same time?
The third chance is ask Oracle support (metalink and ask what they suggest
for his specific situation).
Alan, if you have metalink support, can you ask them?, I don't have.
I think they will can give a better answer, because at last, it is a problem
of licnsing, and they
must give a guide to measure it.
:)
Thanks.
> Hi Juan,
>
> By "autonomus function" do you mean 'pragma autonomous_transaction'?
>
> If so, then it works.
>
> First dos prompt:
> connect as system
> SQL> alter system set license_max_sessions=2;
>
> System altered.
>
> --leave sql/plus session active.
>
> second dos prompt:
> connect as adavey
>
> --leave active.
>
> third dos prompt:
> connect as scott/tiger
> ERROR:
> ORA-00019: maximum number of session licenses exceeded
>
> Back to second dos prompt:
> SQL> ed
> Wrote file afiedt.buf
>
> 1 create or replace procedure test as
> 2 pragma autonomous_transaction;
> 3 begin
> 4 null;
> 5* end;
> SQL> /
>
> Procedure created.
>
> SQL> exec test;
>
> PL/SQL procedure successfully completed.
>
> I'm not familiar with developer, but from my experience with JDeveloper
and
> Toad, the various windows are all working via one user session.
>
> I believe we need more information from the original poster to see exactly
> what his requirements are.
>
>
> -------------------------------
> Alan Davey
> Senior Programmer/Analyst
> Oracle 9i OCA
> w) 973-267-5990 x458
> w) 212-295-3458
>
>
>
> -----Original Message-----
> From: Juan Cachito Reyes Pacheco [mailto:jreyes_at_dazasoftware.com]
> Sent: 18 March 2004 15:40
> To: oracle-l_at_freelists.org
> Subject: Re: How to restrict the user connections
>
>
> Hi Alan, this is true if he runs a single session client,
> This is not true if he for example is using developer , then every window
> can be a
> distinct session.
> Every user can have more than a session. For example what happen if he
runs
> an
> autonomus function?
> :)
> ----- Original Message -----
> From: "Davey, Alan" <Alan.Davey_at_encodasystems.com>
> To: <oracle-l_at_freelists.org>
> Sent: Thursday, March 18, 2004 2:44 PM
> Subject: RE: How to restrict the user connections
>
>
> > Hi Juan,
> >
> > license_max_sessions is the correct answer until Senthil answer's Tim's
> > question as to why it isn't good enough.
> >
> > You can go the trigger route, but unless there is a compelling reason to
> do
> > so (only allow specific users), it requires more time spent programming
> and
> > debugging (hmm, there are 20 current users and I now I can't log in as
my
> > dba account to perform/fix xxx).
> >
> > -----------------------------------------
> > Alan Davey
> > Senior Analyst/Project Leader
> > Oracle 9i OCA; 3/4 OCP
> > w) 973.267.5990 x458
> > w) 212.295.3458
> >
> >
> >
> > -----Original Message-----
> > From: Juan Cachito Reyes Pacheco [mailto:jreyes_at_dazasoftware.com]
> > Sent: Thursday, March 18, 2004 12:00 PM
> > To: oracle-l_at_freelists.org
> > Subject: Re: How to restrict the user connections
> >
> >
> > Hi Alan,
> >
> > LICENSE_MAX_SESSIONS specifies the maximum number of concurrent user
> > sessions allowed. When this limit is reached, only users with the
> RESTRICTED
> > SESSION privilege can connect to the database. Users who are not able to
> > connect receive a warning message indicating that the system has reached
> > maximum capacity.
> >
> > LICENSE_MAX_USERS specifies the maximum number of users you can create
in
> > the database. When you reach this limit, you cannot create more users.
You
> > can, however, increase the limit.
> >
> > I think none of both are a solution, because license max user limits the
> > number of user created, and license max sessions limits the maximum
number
> > of concurrent user sessions allowed.
> >
> > I think you 'll have to use a trigger.
> >
> > ----- Original Message -----
> > From: "Davey, Alan" <Alan.Davey_at_encodasystems.com>
> > To: <oracle-l_at_freelists.org>
> > Sent: Thursday, March 18, 2004 11:29 AM
> > Subject: RE: How to restrict the user connections
> >
> >
> > > Hi,
> > >
> > > I replied to your email too quickly.
> > >
> > > You can also set license_max_sessions dynamically via alter system.
So
> if
> > > you only need to set it for certain times, then that is another
option.
> > >
> > > HTH,
> > >
> > > -----------------------------------------
> > > Alan Davey
> > > Senior Analyst/Project Leader
> > > Oracle 9i OCA; 3/4 OCP
> > > w) 973.267.5990 x458
> > > w) 212.295.3458
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: Davey, Alan
> > > Sent: Thursday, March 18, 2004 9:40 AM
> > > To: 'oracle-l_at_freelists.org'
> > > Subject: RE: How to restrict the user connections
> > >
> > >
> > > Hi,
> > >
> > > Create a logon trigger that checks the number of sessions, and if more
> > than
> > > 20 exists, it will randomly select one and kill it. The idea being
that
> > > that user has probably been on long enough and needs to learn to share
> > > resources.
> > >
> > > Alternatively, you can set license_max_sessions in your init.ora file.
> > >
> > > -----------------------------------------
> > > Alan Davey
> > > Senior Analyst/Project Leader
> > > Oracle 9i OCA; 3/4 OCP
> > > w) 973.267.5990 x458
> > > w) 212.295.3458
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: Senthil Kumar [mailto:senthilkumard_at_summitworks.com]
> > > Sent: Thursday, March 18, 2004 9:28 AM
> > > To: oracle-l_at_freelists.org
> > > Subject: How to restrict the user connections
> > >
> > >
> > > Hi List,
> > >
> > > How do I restrict the number of user connections. I want only 20 users
> to
> > > access the database on a particular time.
> > >
> > > How do I do this.
> > >
> > > TIA
> > > Senthil.
> > >
> > >
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