shell# su - oracle
shell# sqlplus / as sysdba

SQL> CREATE USER zabbix IDENTIFIED BY zabbix DEFAULT TABLESPACE SYSTEM
TEMPORARY TABLESPACE TEMP PROFILE DEFAULT ACCOUNT UNLOCK;  
SQL> GRANT CONNECT TO zabbix;
SQL> GRANT RESOURCE TO zabbix;
SQL> ALTER USER zabbix DEFAULT ROLE ALL;
SQL> GRANT SELECT ANY TABLE TO zabbix;
SQL> GRANT CREATE SESSION TO zabbix;
SQL> GRANT SELECT ANY DICTIONARY TO zabbix;
SQL> GRANT UNLIMITED TABLESPACE TO zabbix;
SQL> GRANT SELECT ANY DICTIONARY TO zabbix;
SQL> GRANT SELECT ON V_$SESSION TO zabbix;
SQL> GRANT SELECT ON V_$SYSTEM_EVENT TO zabbix;
SQL> GRANT SELECT ON V_$EVENT_NAME TO zabbix;
SQL> GRANT SELECT ON V_$RECOVERY_FILE_DEST TO zabbix;