• ORACLE-BASE - Instance Caging to Manage CPU Usage in Oracle Database 11g Release 2
  Managing CPU usage can be an issue when trying to consolidate multiple databases on to a single server, because if one database starts to hog all the CPU on the server, all the other databases will be affected
  in Oracle > DB 11g with 11gr2 aio asynch asynchronous count cpu cpu_count databases io managing multiple oracle parameter server

cpu_count from all users