create?user?mchis?profile?"DEFAULT"?IDENTIFIED?by?"mchis#150"?account?unlock; grant?dba?to?mchis;修改其
1、修改會話數查詢數據庫當前進程的連接數：select count(*) from v$process;修改數據庫允許的最大連接數：alter system set processes =1500 s
