Wednesday, April 26, 2017

How to increase PROCESSES initialization parameter:



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.    If you are planning to increase "PROCESSES" parameter you should also plan to increase "sessions 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
     
4.    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


alter system set processes=500 scope=spfile;
    alter system set sessions=555 scope=spfile;
    alter system set transactions=610 scope=spfile;

show parameter sessions
    show parameter processes
    show parameter transactions

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