Control apparatus and non-transitory recording medium having stored therein control program

A control apparatus comprising:

• a processor;
• a first storing region and a second storing region that store device information of a monitoring target device;
• and
• an evacuating region that stores at least part of the device information, wherein
• the processor is configured to execute a procedure, the procedure comprising:
• controlling switching between a first state and a second state at a predetermined timing, the first state including the first storing region being in an updatable state representing that the device information stored therein is unable to be referred from a monitoring device and is able to be updated by the monitoring device, and the second storing region being in a referenceable state representing that the device information stored therein is able to be referred by the monitoring device and is unable to be updated by the monitoring device, the second state including the first storing region being in the referenceable state and the second storing region being in the updatable state;
• evacuating, in a case where the second storing region is being referred from the monitoring device at a timing when the first state is switched to the second state, unreferred device information which is unreferred from the monitoring device among the device information stored in the second storing region to the evacuating region;
• controlling, after completion of evacuation of the unreferred device information to the evacuating region, switching the second storing region from the referenceable state to the updatable state;
• and
• controlling, after completion of reference to the unreferred device information in the evacuating region by the monitoring device, switching the first storing region from updatable state to the referenceable state.