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## Key Performance Indictors (Best Practice Performance Guidelines) 

You can view the key metrics that are outside of a standard range for storage systems that run IBM FlashSystem 9100 by using the performance guidelines. The guidelines were established by a historical analysis of storage environments. 

Most of the performance charts show an orange line that indicates the best practice value for the metric. These guidelines are established as the levels that allow for a diverse set of workload characteristics while maintaining a stable performance profile. The other lines on each chart represent the measured values for the metric for the resources on your storage system: I/O groups, ports, or canisters. 

You can use the lines to compare how close to potentially becoming overloaded your resources are. If your storage system is responding poorly and the charts indicate overloaded resources, you might have to better balance the workload. You can balance the workload between the canisters of the cluster, potentially adding more canisters to the cluster, or move some workload to other storage systems. 

Figure 8-7 shows the Key Performance Indicators in the Dashboard. 

<img src='content_image/984000.jpg'>

The charts show the hourly performance data measured for each resource on the selected day. Use the following charts to compare the workloads on your storage system with the best practice guidelines: 

GLYPH<SM590000> Node Utilization Percentage by Node : Compare the guideline value for this metric, for example, 60% utilization, with the measured value from your system. 

The average of the bandwidth percentages of those ports in the node that are actively used for host and MDisk send and receive operations. The average is weighted by port speed and adjusted according to the technology limitations of the node hardware. For clusters without FC ports this chart is empty (or when no host I/O is going on). 

GLYPH<SM590000> Overall Port Bandwidth Percentage by Port : Compare the guideline value for this metric, for example, 50%, with the measured value from your system. Because a cluster can have many ports, the chart shows only the eight ports with the highest average bandwidth over the selected day. 

