Concurrent sessions

Hi there,
I have changed the default profile for all user session
FROM OEM:
ALTER PROFILE "DEFAULT"
LIMIT SESSIONS_PER_USER 1
But I can still create unlimited sessions of SCOTT user...
Any Idea ?

RESOURCE_LIMIT
Parameter type
Boolean
Default value
false
Parameter class
Dynamic: ALTER SYSTEM
Range of values
true | false
RESOURCE_LIMIT determines whether resource limits are enforced in database profiles.
Values:
TRUE
Enables the enforcement of resource limits
FALSE
Disables the enforcement of resource limits
See Also:
Oracle9i Database Administrator's Guide and Oracle9i SQL Reference for more information on setting resource limits for profiles
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96536/ch1181.htm#REFRN10188
Joel P�rez

Similar Messages

Whats the limit of max no of concurrent sessions in oracle9i database

Hi,
pls let me know whats the limit of max no of concurrent sessions in oracle9i database .
Thanks.

Hi,
Oracle no longer offers licensing by the number of concurrent sessions.
There used to be 2 initialization parameters : - LICENSE_MAX_SESSIONS and LICENSE_SESSIONS_WARNING . these have been deprecated.
Therefore Jaffer's statements stands.....
Cheers...rCube.

Large number of concurrent sessions

What optimizations are used to provide a large number of concurrent sessions?

Generally:
1) Design so that clustering is easy - e.g. cache only read-only data, and
cache it agressively
2) Keep replication requirements down - e.g. keep HTTP sessions small and
turn off replication on stateful session beans
3) Always load test with db shared = true so that you don't get nasty
surprise when clustering
4) Don't hit the database more than necessary - generally the db scales the
poorest
Peace,
Cameron Purdy
Tangosol, Inc.
Clustering Weblogic? You're either using Coherence, or you should be!
Download a Tangosol Coherence eval today at http://www.tangosol.com/
"Priya Shinde" <[email protected]> wrote in message
news:3c6fb3bd$[email protected]..
>
What optimizations are used to provide a large number of concurrentsessions?

Total concurrent sessions in database.

I have a doubt as to how to check the total concurrent sessions on the database. I mean, how many total sessions are connected to the database at any particular moment.
I hope, my question is clear.
Please, help in solving the doubt.
regards

Is this a duplicate of your other question?
Total sessions in database
Have you looked up the V$SESSION table i the documentation? That's probably what you're looking for.
Justin

Concurrent sessions accessing parsed sql from the library cache

Hi there,
I am having five concurrent session firing exactly same SQL statement inside a stored procedure.
Stored Procedure
PROC1(a int)
begin
select <C1>,<C2> into <V1>,<V2> from <T1>, <T2> where <JOIN between both table> and T1.<C3>=a;
end;
All those five sessions are calling the procedure PROC1 which subsequently executes the sql statement.
Execution time of sql statement is 2 seconds.
I ma wondering whether all other sessions will wait for the currently executing session to release the latch on parsed sql(getting stored in the library cache)? (In this case last session will wait for 8 seconds) Or would they execute in parallel with their own copy of parsed sql?
Please help!!!
TIA,
Nishant

Would it be like that the first session will hard parse the SQL statement and all other concurrent sessions will have a "softer" soft parse and take a copy of query plan and execute the statement without waiting for each otherYes, I think this is the way it works according to official Oracle documentation
(and why there is a shared pool).:
http://download-uk.oracle.com/docs/cd/B19306_01/server.102/b14220/sqlplsql.htm#i2196
But I don't know if you can find detailed documentation about all latching steps for hard parse and soft part steps.

Concurrent sessions accessing parsed sql from teh library cache

Hi there,
I am having five concurrent session firing exactly same SQL statement inside a stored procedure.
Stored Procedure
PROC1(a int)
begin
select <C1>,<C2> into <V1>,<V2> from <T1>, <T2> where <JOIN between both table> and T1.<C3>=a;
end;
All those five sessions are calling the procedure PROC1 which subsequently executes the sql statement.
Execution time of sql statement is 2 seconds.
I ma wondering whether all other sessions will wait for the currently executing session to release the latch on parsed sql(getting stored in the library cache)? (In this case last session will wait for 8 seconds) Or would they execute in parallel with their own copy of parsed sql?
Please help!!!
TIA,
Nishant

Can you please elaborate a little further.
AFAIK the query plans are stored in the library cache and there will be latches on data structures. Won't it mandate serial execution? Please correct me if I am wrong.
Thanks...
Nishant

No of Concurrent Sessions Per User Mismatch with profile settings

Hi
DB Version Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
OS RHES 5U2
I created a profile MYPROFILE and set the value of Concurrent Sessions (Per User) to 30. DB was bounced after creating the profile. I made this profile default for a particular user "MYUSER". I verified that by querying DBA_USERS (select profile from dba_users where username like 'MYUSER') I checked v$session with that particular user after sometime and noticed that it was showing 34 sessions. Some ACTIVE and some INACTIVE.
My question is, if I have set the maximum limit of concurrent sessions per user to 30 in myprofile and made this the default profile for MYUSER, then how come i am still able to see more than 34 sessions of myuser regardless of the status? I am not sure if this is relevant or not but the IDLE TIME is set to 15 minutes.
Thank you for your help
Edited by: user560883 on Jul 4, 2010 12:45 AM

user560883 wrote:
Hi
DB Version Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
OS RHES 5U2
I created a profile MYPROFILE and set the value of Concurrent Sessions (Per User) to 30. DB was bounced after creating the profile. I made this profile default for a particular user "MYUSER". I verified that by querying DBA_USERS (select profile from dba_users where username like 'MYUSER';) I checked v$session with that particular user after sometime and noticed that it was showing 34 sessions. Some ACTIVE and some INACTIVE.
My question is, if I have set the maximum limit of concurrent sessions per user to 30 in myprofile and made this the default profile for MYUSER, then how come i am still able to see more than 34 sessions of myuser regardless of the status? I am not sure if this is relevant or not but the IDLE TIME is set to 15 minutes.
Thank you for your helpDid you set the parameter resource_limit=true ? You must do it before you test sessions_per_user. You can do so like the following,
alter system set resource_limit=true;After this again try and post the feedback.
HTH
Aman....

Testing for concurrency .. How to simulate multiple concurrent sessions?

All,
I was going through Tom Kyte's Expert Oracle one on one and he explains how we can test the scalability of queries by running them concurrently for multiple sessions.
My (rather naive) question is how do you simulate those five concurrent sqlplus sessions?
a). Do you just do an alt + tab to each session and run the same procedure?
(I did this for two sessions and was able to see the wait times etc.. but for more sessions (5.or more.) ,the approach doesn't look right..By the time I go to the 5th session and execute it, the first one is way under progress. Also, It is clearly evident they are not all concurrent sessions.
b) Schedule 5 different jobs to run the same procedure at the same time..?
Any other approach...?
Thanks for your time in advance!
John.

There are also many other ways to achieve that.
For example
a self developed multithreaded client application that connects several times, the best one in my opinion for simulating heavy loads,
or
background commands ( submitted with a final "&" in a unix shell or with the equivalent Start-PSJob in the new Microsoft powershell v2 )
But the reason to choose among one of them only depends by the specific case and your preferences.
Bye Alessandro

What is the Maximum Number of Concurrent Sessions allowed on a Shared Exchange Mailbox ?

Hi,
I have a query that how many concurrent sessions are allowed on a Resource Mailbox ?
E.g. I have a scenario in which i run a Helpdesk, and it has an email address ([email protected]), where company employees can email thier IT Issues/requests.
Now I have hired say 50 Service Desk agents, now is it possible that all 50 can access the IThelpdesk mailbox at one time ? Are there any limits on the number of the concurrent sessions of the mailbox ? What are the the permutations and combinations in this
case ?
** The mailbox is on Exchange Server 2003**
Regards,
Tojo Thankachan
+91 7875039665

Hi,
Exchange Server 2003 SP1 imposes a restriction on the number of permitted MAPI sessions per user. By default, the maximum number of permitted MAPI sessions per user is set to a hexadecimal value of 0x20 after you apply Exchange Server 2003 SP1.
Generally, Event ID 9646 will be logged in the application event log of your Exchange Server 2003 computer when a client opens many MAPI sessions. Here is a KB descripted the details of it:
http://support.microsoft.com/kb/842022
For more information about MAPI session limit, please refer to:
http://technet.microsoft.com/en-us/library/dd159906(v=exchg.80).aspx
Thanks,
Winnie Liang
TechNet Community Support

Q: Count concurrent sessions per hours in a specified interval

Hi,
I have this table wich contains SESSIONID, CREATEDATE, LASTCHECKDATE, EXPIREDATE, PARTNERID
We need to make a query that would return the number of max concurent session per hours for the interval specified.
For example, for last week, on a per hour bases, or day bases, the top concurent session for each hour or day depending on the report.
can do the number of new session on each hour with this query;
SELECT TO_CHAR(createdate, 'YYYY/MM/DD HH24') ||'h ' start_time, COUNT( SESSIONID ) new_sessions, name || ' {' || partnerid || '}' as Partner
FROM uws
WHERE expiredate IS NOT NULL
and partnerid=25
and TO_CHAR(createdate,'YYYY/MM') = '2010/05'
group by TO_CHAR(createdate, 'YYYY/MM/DD HH24') ||'h ', name || ' {' || partnerid || '}'
ORDER BY 1 DESC;
I think I should use MAX(count(sessionid)) and probably some DECODE when c1 between createdate and lastcheckdate...
This would need to run on sqlplus from a shell script if possible and even chart it on Google Charts.
Any help appreciated, note that I am not an Oracle expert..
Edited by: user11954725 on Jul 19, 2010 5:55 PM

Thanks Frank,
I think we are very close to the solution I am looking for now;
Here is the script you gave me (with little modifications) and the output;
WITH     all_hrs          AS
     SELECT     min_hr + ((LEVEL - 1) / 24)     AS period
     ,     min_hr + (LEVEL / 24)     AS next_period
     FROM     (
               SELECT TRUNC (MIN (createdate), 'HH')     AS min_hr
               ,     TRUNC (MAX (LASTHEARTBEATDATE), 'HH')     AS max_hr
               FROM     userwebsession
where createdate <= TO_DATE('07-MAY-2010 00.00.00','DD-MON-RR HH24.MI.SS')
and LASTHEARTBEATDATE >= TO_DATE('07-MAY-2010 23.59.59','DD-MON-RR HH24.MI.SS')
     CONNECT BY     LEVEL <= 1 + (24 * (max_hr - min_hr))
SELECT     TO_DATE(a.period,'DD-MON-YY hh24') "Period"
,     COUNT (u.userwebsessionid)     AS sessions
FROM          all_hrs     a
LEFT OUTER JOIN     userwebsession     u     ON     a.period     <= u.LASTHEARTBEATDATE
                    AND     u.createdate     <= a.next_period
group by a.period
ORDER BY a.period
               SELECT TRUNC (MIN (createdate), 'HH')     AS min_hr
               ,     TRUNC (MAX (LASTHEARTBEATDATE), 'HH')     AS max_hr
               FROM     SPEAKESL.userwebsession
where createdate <= TO_DATE('07-MAY-2010 00.00.00','DD-MON-RR HH24.MI.SS')
and LASTHEARTBEATDATE >= TO_DATE('07-MAY-2010 23.59.59','DD-MON-RR HH24.MI.SS');
produce output;
Period SESSIONS
19-APR-10 15
19-APR-10 12
19-APR-10 15
19-APR-10 18
19-APR-10 6
19-APR-10 7
19-APR-10 6
19-APR-10 16
19-APR-10 18
19-APR-10 21
19-APR-10 19
19-APR-10 24
19-APR-10 15
19-APR-10 7
19-APR-10 10
19-APR-10 6
19-APR-10 9
19-APR-10 7
19-APR-10 6
20-APR-10 5
20-APR-10 5
20-APR-10 6
20-APR-10 7
20-APR-10 7
20-APR-10 13
20-APR-10 7
20-APR-10 6
20-APR-10 4
20-APR-10 8
20-APR-10 8
20-APR-10 6
20-APR-10 14
20-APR-10 7
20-APR-10 5
20-APR-10 14
20-APR-10 9
20-APR-10 9
20-APR-10 7
20-APR-10 5
20-APR-10 4
20-APR-10 5
20-APR-10 3
20-APR-10 4
21-APR-10 4
21-APR-10 5
21-APR-10 5
21-APR-10 5
21-APR-10 5
21-APR-10 5
21-APR-10 6
21-APR-10 7
21-APR-10 8
21-APR-10 14
21-APR-10 7
21-APR-10 8
21-APR-10 4
21-APR-10 6
21-APR-10 10
21-APR-10 26
21-APR-10 14
21-APR-10 10
21-APR-10 12
21-APR-10 6
21-APR-10 7
21-APR-10 6
21-APR-10 5
21-APR-10 6
22-APR-10 7
22-APR-10 7
22-APR-10 7
22-APR-10 6
22-APR-10 7
22-APR-10 8
22-APR-10 9
22-APR-10 5
22-APR-10 21
22-APR-10 7
22-APR-10 34
22-APR-10 29
22-APR-10 29
22-APR-10 10
22-APR-10 21
22-APR-10 17
22-APR-10 50
22-APR-10 43
22-APR-10 43
22-APR-10 26
22-APR-10 13
22-APR-10 16
22-APR-10 15
22-APR-10 35
23-APR-10 6
23-APR-10 3
23-APR-10 4
23-APR-10 4
23-APR-10 2
23-APR-10 3
23-APR-10 2
23-APR-10 2
23-APR-10 4
23-APR-10 11
23-APR-10 6
23-APR-10 14
23-APR-10 16
23-APR-10 20
23-APR-10 11
23-APR-10 20
23-APR-10 43
23-APR-10 30
23-APR-10 46
23-APR-10 41
23-APR-10 26
23-APR-10 50
23-APR-10 51
23-APR-10 66
24-APR-10 4
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 5
24-APR-10 5
24-APR-10 3
24-APR-10 2
24-APR-10 3
24-APR-10 5
24-APR-10 6
24-APR-10 5
24-APR-10 4
24-APR-10 3
24-APR-10 4
24-APR-10 4
24-APR-10 2
24-APR-10 2
25-APR-10 2
25-APR-10 2
25-APR-10 2
25-APR-10 2
25-APR-10 2
25-APR-10 2
25-APR-10 3
25-APR-10 3
25-APR-10 4
25-APR-10 4
25-APR-10 4
25-APR-10 3
25-APR-10 2
25-APR-10 2
25-APR-10 5
25-APR-10 6
25-APR-10 4
25-APR-10 5
25-APR-10 4
25-APR-10 5
25-APR-10 6
25-APR-10 5
25-APR-10 3
25-APR-10 3
09-MAY-10 7
09-MAY-10 8
09-MAY-10 8
09-MAY-10 6
09-MAY-10 8
09-MAY-10 8
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
10-MAY-10 7
10-MAY-10 6
10-MAY-10 6
10-MAY-10 7
10-MAY-10 5
10-MAY-10 5
10-MAY-10 5
10-MAY-10 5
10-MAY-10 6
10-MAY-10 12
10-MAY-10 12
10-MAY-10 20
10-MAY-10 12
10-MAY-10 13
10-MAY-10 14
10-MAY-10 17
10-MAY-10 12
10-MAY-10 15
10-MAY-10 14
10-MAY-10 12
10-MAY-10 8
10-MAY-10 8
10-MAY-10 7
10-MAY-10 7
11-MAY-10 7
11-MAY-10 7
11-MAY-10 8
11-MAY-10 8
11-MAY-10 7
11-MAY-10 30
11-MAY-10 37
11-MAY-10 43
11-MAY-10 22
11-MAY-10 14
11-MAY-10 17
11-MAY-10 19
11-MAY-10 26
11-MAY-10 20
11-MAY-10 20
11-MAY-10 30
11-MAY-10 14
11-MAY-10 18
11-MAY-10 11
11-MAY-10 12
11-MAY-10 8
11-MAY-10 8
11-MAY-10 10
11-MAY-10 8
12-MAY-10 14
12-MAY-10 12
12-MAY-10 75
12-MAY-10 51
12-MAY-10 38
12-MAY-10 39
12-MAY-10 22
12-MAY-10 17
12-MAY-10 13
12-MAY-10 12
12-MAY-10 11
12-MAY-10 17
12-MAY-10 30
12-MAY-10 28
12-MAY-10 23
12-MAY-10 20
12-MAY-10 18
12-MAY-10 12
12-MAY-10 15
12-MAY-10 16
12-MAY-10 14
12-MAY-10 28
569 rows selected
MIN_HR MAX_HR
19-APR-10 12-MAY-10
Now the output seem to produce the concurrent sessions as needed but the date range show is not exactly.
I expect the output to display only for the range specified in parameter, which if for this example only one day.
Probably if we ask for more that few days, we would like to display the MAX number of concurrent session for one day and the average (optional) also for that day and this for all days in the period.
So for example based on the above output this next level report would output as follow (for period of 19-APR-10 to 27-APR-10;
19-APR-10 24
20-APR-10 14
21-APR-10 26
22-APR-10 50
23-APR-10 66
24-APR-10 6
25-APR-10 6
26-APR-10 105
27-APR-10 44

Cisco IPS Concurrent session support in ips 4260 and 4270 sensor

I am wondring that no document from Cisco IPS data sheets mention the concurrent session support in Cisco IPS 4200 series sensor. I am looking forward to any one who can advise about the subject.
Thanks
Nouman

Hi.
with IPS devices it's difficult to measure performance by # of connections per second since several factors count to the performance limit, including:
1- packet size.
2- object sizes per transaction
3- transactions per second
4- signatures enabled
5- features enabled
that why public documents try to make it more realistic by mentioning the transactional performance.
here is a link mentioning concurrent connections for 4270:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5729/ps5713/ps4077/prod_white_paper0900aecd806e7283.html
although the link mentiones 100k and 200k, but we've seen situations where we had a lot more connections with a smaller amount of signatures enabled.
for the 4260 the public document only mentions the transactional performance.
Regards,
Fadi.
If this answers your question please mark the thread as resolved.

High concurrent session in database

Hi expertise,
I have a core banking solution database of 9i. In db concurrent session is 1660 and active concurrent session is 70. Due to high concurrent session my ATM transaction are getting hampered. Please suggested me any workaround in this regards
Pinak

918601 wrote:
Hi expertise,
I have a core banking solution database of 9i. In db concurrent session is 1660 and active concurrent session is 70. Due to high concurrent session my ATM transaction are getting hampered. Please suggested me any workaround in this regards
Insufficient data - what does 'hampered' mean, and what is the scale of the problem ?
Can you show us some indication of how you detect the issue and where you are seeing time lost.
I can make a few guesses about a highly concurrent ATM system:
<ul>
Bad coding could result in waits for TX locks in mode 6, although using IOTs (index organized tables) would make these TX mode 4
Unfortunate index design could result in wait for TX locks in mode 4 - particularly ITL waits and index leaf block split waits
Basic infrastructure issues could result in time lost on buffer busy waits
If you've implemented shared servers (formerly MTS) to cater for 1700 connections then you may be waiting for shared servers to become free
If you haven't implemented shared servers your (inactive) processes may still be causing CPU wastage problems at the O/S scheduler level.
</ul>
If the issue is largely the (fairly standard for this type of application) buffer busy waits issue then an investigation of hash partitioning may be appropriate.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com

Concurrent Session Limits to reduce TFO overload

Is there a way to limit the number of concurrent connections per source IP address within a given WAAS?
I often see one IP address (ie. client) consuming more than their fair-share of available optimizable sessions. I'd like to be able to set a maximum concurrent session limit based on a source IP at several of my remote sites. Once the max (let's say 15 concurrent sessions per client) is hit, their next session will automatically go into passthrough. Any new sessions associated with that client IP, up to that limit, would be eligible for optimization.
I know there is a way to do limit this for management users via the System.security.maxSimultaneousLogins, but I'd like to see one that's directed at the optimized traffic.

Is there a way to limit the number of concurrent connections per source IP address within a given WAAS?
I often see one IP address (ie. client) consuming more than their fair-share of available optimizable sessions. I'd like to be able to set a maximum concurrent session limit based on a source IP at several of my remote sites. Once the max (let's say 15 concurrent sessions per client) is hit, their next session will automatically go into passthrough. Any new sessions associated with that client IP, up to that limit, would be eligible for optimization.
I know there is a way to do limit this for management users via the System.security.maxSimultaneousLogins, but I'd like to see one that's directed at the optimized traffic.

VPN 3005 Peak Concurrent Sessions

Hi
I have an old VPN 3005 concentrator that need replacement. At the webinterface under monitoring -> sessions I can see that my Peak Concurrent Sessions is 19. The question is if its 19 sessions peak since last reboot or a specefic time period?
I've 200 vpn session available in the 3005, i planning to replace it with an ASA 5505 with max 25 VPN sessions.
Best Regards, Steffen.

The peak concurrent sessions count from the last reboot or reset on.
If you go for the ASA 5505, you need the Security-Plus-Version, only that supports 25 Users.
Sent from Cisco Technical Support iPad App

Guard Against Concurrent Sessions...

What is a good way to guard against concurrent session. I am using a
          custom user login. When a user logs in, I create a UserSession object
          and add it to their HttpSession. I need a way to invalidate the users
          session when a new login request is made for the same user.
          So basically, if someone tries to login multiple times, all other
          sessions created by that username will be invalidated.
          Any thoughts,
          Thanks,
          -Alan


Alan,
          This is a little bit complex but quite do-able, assuming you know that you
          want to do it (which you should question ... but only you know your app.)
          First, you need to be able to track sessions. Not easy in a clustered
          environment of course. General idea is that when a session is new (i.e. it
          doesn't have your tag on it yet) you add a session attribute that implements
          the HttpSessionBindingListener interface. On valueBound you have to
          register the session. On valueUnbound, you unregister the session. In a
          cluster, registering the session means a shared resource, which might have
          to be an entity EJB. In a non-cluster, it can be an application-level
          object (i.e. an attribute on the ServletContext object).
          Cameron Purdy
          "Alan Moss" <[email protected]> wrote in message
          news:[email protected]..
          > What is a good way to guard against concurrent session. I am using a
          > custom user login. When a user logs in, I create a UserSession object
          > and add it to their HttpSession. I need a way to invalidate the users
          > session when a new login request is made for the same user.
          >
          > So basically, if someone tries to login multiple times, all other
          > sessions created by that username will be invalidated.
          >
          > Any thoughts,
          > Thanks,
          > -Alan

Enable more than two concurrent sessions in Server 2012 r2

Hello,
I have setup RDS on Server 2012 R2 with the following roles: (RD Connection Broker, RD Session Host, RD Gateway, RD Licensing, RD Web Access). My sole purpose for this setup was to enable this server and only this server to allow more than 2
concurrent RDP connections.
Here is some background information:
1. I will not be using RemoteApps or the Web access, I only only need to RDP into this server with more than 2 concurrent connections.
2. The licensing server is activated and I have a 50 user CAL installed on it. It has issued licenses to 3 users that have logged into the server while I was looking at the Web site features. So I know the licensing is working properly.
3. This server does reside in a domain but I'm looking to have everything self contained on just the one box. I do not want to put anything on my domain controller or a separate machine.
4. Everything looks to be fully configured in all of the roles. I have no warnings about things not being configured correctly.
5. When I attempt to login with a 3rd user to this system, it still prompts to have me remove one of the previous 2 sessions.
I know I must be looking right past the setting or it is in a very convoluted space, but how do I enable this server to allow more than 2 RDP sessions? I've made the change in group policy for (Administrative Templates\Windows Components\Remote Desktop
Services\Remote Desktop Session Host\Connections\Limit number of connections) to 50 but this still not seem to correct the problem.
Thanks for any answers you can provide,
Fred Levario

Hi Fred,
Thank you for posting in Windows Server Forum.
Are you working with Domain or Workgroup environment?
Because from your description seems you want everything on single server. To enable more than 2 RDP session for your server we need to Add RD Session Host and RD Licensing Role Services, configure the RD Licensing mode, and licensing server name in the local
group policy, Activate the RD Licensing server and install RDS CALs using RD Licensing Manager.
You can configure the Licensing mode and licensing server through GPO as per below path.
Computer Configuration\ Administrative Templates\ Windows Components\ Remote Desktop Services\ Remote Desktop Session Host\ Licensing
Use the specified Remote Desktop license servers - Provide the FQDN of the license servers to use
Set the Remote Desktop licensing mode - Specify the ‘per user’ or ‘per device’ licensing types
More information.
RD Licensing Configuration on Windows Server 2012
http://blogs.technet.com/b/askperf/archive/2013/09/20/rd-licensing-configuration-on-windows-server-2012.aspx
Hope it helps!
Thanks.
Dharmesh Solanki
TechNet Community Support

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