AWS’s Top 5 Commands: ALTER SYSTEM and Managing SYS Objects in RDS

Posted in: Cloud, Oracle, Technical Track

We often manage services over EC2, this is not news. But when migrating to Amazon RDS, it’s usual for new users to have issues with performing some administrative actions on the database, especially when it’s done via internal Oracle procedures or when it requires privileges beyond the ones we have available on RDS credentials, even though they are part of DBA work.

Amazon Web Services created internal procedures so we can still execute those actions, but in a different manner. I decided to list five daily basis commands / procedures that frequently cause questions for initial users. Here it goes:

Kill sessions:

begin
rdsadmin.rdsadmin_util.kill(
sid => &sid,
serial => &serial,
method => 'IMMEDIATE');
end;
/

Flush shared_pool or buffer_cache:

exec rdsadmin.rdsadmin_util.flush_shared_pool;
exec rdsadmin.rdsadmin_util.flush_buffer_cache;

Grant Privileges to SYS Objects:

# Grant

begin
    rdsadmin.rdsadmin_util.grant_sys_object(
        p_obj_name  => 'V_$SESSION',
        p_grantee   => 'PYTHIAN',
        p_privilege => 'SELECT');
end;
/

# Grant with Grant Option

begin
    rdsadmin.rdsadmin_util.grant_sys_object(
        p_obj_name     => 'V_$SESSION',
        p_grantee      => 'PYTHIAN',
        p_privilege    => 'SELECT',
        p_grant_option => true);
end;
/

# Revoke

begin
    rdsadmin.rdsadmin_util.revoke_sys_object(
        p_obj_name  => 'V_$SESSION',
        p_revokee   => 'PYTHIAN',
        p_privilege => 'SELECT');
end;
/

Hope this helps!

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About the Author

Lead Database Consultant
Well known in the Oracle community in Latin America and Europe where he participates regularly in technology events, Matheus is actually the youngest Oracle ACE Director in the world. Lead Database Consultant at Pythian, Matheus is a Computer Scientist by PUCRS and has been working as an Oracle DBA for the last 10 years.

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