Monitoring apparatus and computer-readable storage medium

A computer-readable storage medium that stores a program which, when executed by a computer, causes the computer to perform a monitoring process to monitor a system that includes an oscillator having a variable oscillation frequency, said program comprising:

• a transmitting procedure causing the computer to transmit an information collecting instruction for collecting state information of the system to the system at an arbitrary monitoring timing;
• and
• a control procedure causing the computer to perform a control operation that includes:
• transmitting to the system control information for controlling an oscillation frequency of the oscillator to become a reference value or less if the oscillation frequency exceeds the reference value, based on a result of comparing state information collected and received from the system and the reference value of the state information stored in the storing unit which stores the reference value of state information of the system, including at least frequency information related to the oscillation frequency of the oscillator, and changing amount information, including at least changing amount information related to an anticipated changing amount of the oscillation frequency of the oscillator due to aging of the oscillator,
• computing the changing amount of the oscillation frequency at least due to aging based on a result of comparing state information collected at a previous monitoring timing and state information collected at a present monitoring timing and the changing amount information stored in the storing unit, and
• computing a next monitoring timing based on the computed changing amount of the oscillation frequency and storing this next monitoring timing in the storing unit.