Example: Set the java_pool_size parameter (found in the Memory category) to 125829120 (or 120M):

Alternative 1

  1. Connect to the database as SYS
  2. View current setting: 
    show parameter java_pool_size
  3. Change setting: 
    alter system set java_pool_size='120M' scope=spfile;
  4. Restart the database: 
    shutdown
startup

Alternative 2

  1. Go to Enterprise Manager Database console, e.g. http://server.company.com:1158/em
  2. Log in as SYS

  3. Click Administration
  4. Click All Initialization Parameters in the Database Configuration section
  5. Click SPFile

  6. In the Category field, select Memory
  7. Click Go

  8. Enter 125829120 in the java_pool_size field
  9. Click Apply

  10. When all changes have been made, restart the database