ORA-00018 maximum number of sessions exceeded

Breadcrumb Abstract Shape
Breadcrumb Abstract Shape
Breadcrumb Abstract Shape
Breadcrumb Abstract Shape
Breadcrumb Abstract Shape
Breadcrumb Abstract Shape
  • User AvatarKiran Dalvi
  • 05 Sep, 2023
  • 0 Comments
  • 38 Secs Read

ORA-00018 maximum number of sessions exceeded

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!