Item | Description | Evaluation |
|---|---|---|
CPU usage rate | Allows CPU usage rates to be ascertained and compared. | Check deviations and peaks in CPU usage rates. If the CPU usage rate consistently exceeds 80%, a CPU bottleneck may be degrading performance, or such a problem may be about to occur. It is necessary to consider taking measures such as increasing or upgrading the CPUs, adjusting the application execution schedule, or relocating some applications to a different server. Warning level: CPU usage rate > 80 % |
CPU queue length | A composite graph showing the CPU queue length and the execution wait time rate. | If CPU queue length > 10 or if CPU execution wait time rate > 90% and (the number of queue requests) / (the number of processors) > 2, response may be being degraded because multiple processes are waiting for CPU allocation. If it is not possible to perform interactive job tuning or to restrict the number of concurrent processes, the user should consider increasing the number of CPUs. If CPU execution wait time rate > 90% and the number of queue requests < 1, a single program may be monopolizing the CPU. If there are no problems with the interactive job response, etc., there is no need to perform tuning. If there is a problem, lower the priority of the program that is monopolizing the CPU. Note that if there are any other resources that are experiencing a bottleneck, increasing the number of CPUs is unlikely to improve the situation. Warning level: CPU execution wait time rate > 90% and the number of queue requests < 1 Note This information is displayed when a Solaris server is analysis and reported. |
