System resource utilization
Thus, you can spot resources that are being overutilized and take steps to correct the problem before delays occur. You can also identify underutilized resources and redistribute work to them, thus balancing the workload across the entire resource configuration.
You can get a complete understanding of resource utilization by finding answers to these questions:
- Is the processor complex overutilized?
- How efficient is the I/O configuration?
- How efficient are the SMS storage groups?
- Is storage being used efficiently?
- How efficient is the paging subsystem?
- Are data spaces performing satisfactorily?
- Which resources are experiencing enqueue?
- Is SRM configured for maximum throughput?
- How efficient is the LPAR-defined capacity?
- What is the CPC (central process complex) model and capacity?
- Is On/Off Capacity on Demand (OOCoD) active?
- Are any spin locks or suspend locks held excessively?
This information can help you quickly detect abnormal uses of a resource—such as a batch job in a CPU loop—thus avoiding costly exploitation of the resource. It can also help you evaluate the efficiency of tuning changes made to your system.
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