oracle19c
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SYS
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SYSTEM
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SET SERVEROUTPUT ON
DECLARE
  l_latency  PLS_INTEGER;
  l_iops     PLS_INTEGER;
  l_mbps     PLS_INTEGER;
BEGIN
  DBMS_RESOURCE_MANAGER.calibrate_io(
    num_physical_disks => 1,
    max_latency        => 50,
    max_iops           => l_iops,
    max_mbps           => l_mbps,
    actual_latency     => l_latency
  );

  DBMS_OUTPUT.put_line('Max IOPS = ' || l_iops);
  DBMS_OUTPUT.put_line('Max MBPS = ' || l_mbps);
  DBMS_OUTPUT.put_line('Latency  = ' || l_latency);
END;
/