1.1.1 Finding the causes of system overload and identifying its effects on the system resources
If the system load is high for specific reasons, you must restore the system to its normal status in order to minimize adverse effects on the entire system. Therefore, finding the causes of system overloads and identifying their effects on the system resources are important tasks for maintaining stable system operation.
If a performance problem arises, resulting in high system loading, possible causes are as follows:
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There is a memory shortage.
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A program is monopolizing use of specific resources.
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A subsystem has failed or is configured incorrectly.
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There is fluctuation in loading among subsystems.
Obtaining the statuses of the following system resources will assist in correcting these causes:
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Processor
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Memory
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Disk
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Network
PFM - RM for Platform can identify the system resources that are linked to the causes of system overloads by changing various conditions of performance monitoring (such as the number of users that are connected concurrently) and monitoring performance continuously.
Identifying the status of system resources is also useful for evaluating future system operation, such as when you change or adjust the system configuration or when you plan to upgrade the system's resources.