Session Limit per POD?

Question

Hi!
I understand that a POD can hold multiple SOD instances
- Each SOD instance has a limit on the amount of concurrent sessions you can open (when transmiting WS calls)
Now.
... If I have 5 SOD instances in a given POD
... and each of these 5 instances can open up to 10 concurrent sessions.
... this will mean theoretically in a multithreaded environment (transmitting to 5 instances concurrently),
I can have up to 50 (5x10) concurrent open sessions.
HOWEVER ... is there a such a thing as session limit per POD (that we should take into consideration)?
Meaning if we have 6 SOD instance (each with 10 max concurrent sessions) in a given POD ...
... and a POD have a limit of 30 max concurrent sessions
... we should NOT be running all 6 concurrently (because it will need 60 concurrent sessions which exceeds POD limit).
To reiterate the question... Is there such thing as max number of allowable sessions per POD?
Thanks

Answer 1

First, you should not "patch" directly the spfile but user ALTER SYSTEM command.
Note also that SESSIONS is a derived parameter from PROCESSES.
To increase SESSIONS parameter:
1. connect with SYSDBA privilege:
sqlplus / as sysdba2. change PROCESSES parameter:
SQL> alter system set processes=200 scope=spfile;3. reboot instance
shutdown immediate
startup4. check parameter sessions:
SQL> show parameter sessions;
NAME                                 TYPE        VALUE
java_max_sessionspace_size           integer     0
java_soft_sessionspace_limit         integer     0
license_max_sessions                 integer     0
license_sessions_warning             integer     0
logmnr_max_persistent_sessions       integer     1
sessions                             integer     225
shared_server_sessions               integerBefore the change, I had PROCESSES set to 150 and SESSIONS to 170.
To count all sessions in your instance:
select count(*) from v$session;Please make sure also to give exact Oracle error message number if any.
Message was edited by:
Pierre Forstmann