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ORA-00018 maximum number of sessions exceeded

Asked by OracleDba••13 views•oracle

#oracle#error

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ORA-00018 maximum number of sessions exceeded

Let’s increase SESSION initialization parameter:

If you want to increase “sessions” parameter you should also need to increase

“processes and “transactions” parameters.

A basic formula for determining these parameter values is as follows:

processes=x

sessions=x*1.1+5

transactions=sessions*1.1

1. Login as sysdba

 sqlplus / as sysdba

 

2. Check Current Setting of Parameters

 sql> show parameter sessions

 sql> show parameter processes

 sql> show parameter transactions

  

3. These paramters can't be modified in memory. You have to modify the spfile only 

(scope=spfile) and bounce the instance.

 sql> alter system set processes=500 scope=spfile;

 sql> alter system set sessions=555 scope=spfile;

 sql> alter system set transactions=610 scope=spfile;

 sql> shutdown abort

 sql> startup

Hope it helps!
OracleDba•

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