Fabric metric apps - questions

[Markds]

Hi, 

A question related to the Fabric Metric App: when I have a high percentage of background in the CU% graph, for example, 500%, what does that necessarily mean?

I only have this percentage when I stop the fabric capacity. What conclusions can I draw from that?

[Anonymous · Accepted solution]

Hi @Markds ,

In the Fabric Metric App, the CU% graph displays the percentage of capacity units (CUs) consumed by different types of operations.

When you see a high percentage of background operations (for example, 500%), it indicates that a large number of CUs are used for background tasks. These tasks typically include back-end processes, such as data refreshes that are not directly triggered by user actions.

The fact that you only see such a high percentage when you stop fabric capacity indicates that these background operations consume a lot of resources when the system is not actively processing user requests. This could mean that your capacity is heavily utilized for maintenance or other automated processes during downtime.

If you want to know more please refer to the official documentation below:

Understand the metrics app compute page - Microsoft Fabric | Microsoft Learn

Best Regards,
Yang
Community Support Team

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[frithjof_v · Accepted solution]

Perhaps this link directly answers your question:

https://learn.microsoft.com/en-us/fabric/enterprise/monitor-paused-capacity#why-is-my-capacity-spiki...

"To allow your capacity to perform at the highest level, its usage is smoothed over time. When you pause your capacity, the remaining cumulative overages and smoothed operations are executed. As a result, a spike appears in the Utilization visual.

The spike provides an indication that your capacity was paused. You can hover over the spike to view and see the state of the capacity in the tooltip."

[frithjof_v]

Hi @Markds ,

I don't know the answer to your question, however I am curious what happens if we pause a capacity, and I'm wondering if the behaviour you experience is related to the below information:

The docs says "When you pause your capacity, the remaining cumulative overages and smoothed operations on your capacity are summed, and added to your Azure bill. You can monitor a paused capacity using the Microsoft Fabric Capacity Metrics app."

https://learn.microsoft.com/en-us/fabric/enterprise/pause-resume

I'm wondering if the high CU% you observe is caused by the summing up of overages and smoothing when you pause a capacity.

Do you notice any extra billing when you pause the capacity?

[Anonymous · Accepted solution]

Hi @Markds ,

In the Fabric Metric App, the CU% graph displays the percentage of capacity units (CUs) consumed by different types of operations.

When you see a high percentage of background operations (for example, 500%), it indicates that a large number of CUs are used for background tasks. These tasks typically include back-end processes, such as data refreshes that are not directly triggered by user actions.

The fact that you only see such a high percentage when you stop fabric capacity indicates that these background operations consume a lot of resources when the system is not actively processing user requests. This could mean that your capacity is heavily utilized for maintenance or other automated processes during downtime.

If you want to know more please refer to the official documentation below:

Understand the metrics app compute page - Microsoft Fabric | Microsoft Learn

Best Regards,
Yang
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!