DB pre-requisites to configure OEM12c

Database Pre-requisites to install the OEM 12c


### Deconfigure the dbconsole with below command ###


$emca -deconfig dbcontrol db -repos drop -HOST host01.example.com -PORT 1521 -SID emrep -SYS_PWD oraclepwd -SYSMAN_PWD oraclepwd -DBSNMP_PWD oraclepwd Y


### Set the parameter as per below on the OEM dataabse ###


sqlplus /nolog
 connect / as sysdba
 alter system set session_cached_cursors=200 scope=spfile;
 alter system set log_buffer=10485760 scope=spfile;
 alter system set processes=500 scope=spfile;
 alter database datafile '/u01/app/oracle/database/oradata/emrep/undotbs01.dbf' resize 250M;
 shutdown immediate
 startup
 exit