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JeremyYoung's avatar
JeremyYoung
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2 years ago
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Understanding Fabric Capacity Metrics

Hi All   I am trying to work out what my Spark job converting 50k deeply nested jsons to lakehouse tables will cost me in terms of CUs. I did the work in January. I have a Trial Fabric licence. I h...
  • R1k91's avatar
    2 years ago

    my 2 cents

     

    2. It is showing 18727 seconds (=5hrs) of Synapse Notebook usage on 24th Feb (my birthday) when nothing was running AFAIK. Any ideas what this would be?

     

    not sure but:

    - notebooks session stay alive even if you closed the notebook itself. 

    Microsoft Fabric – Notebook session usage explained (And how to save CU’s or billed time) - FourMoo | Power BI | Data Analytics

    - bursting is something that happens behind the scenes also borrowing capacity up to 24 hours for background operations.

     

    3. What is the relationship between what I see here and the number of CUs I need? The trial is F64 and I will want to buy F2. How do I understand what this workload (whatever it is!) will look like on an F2?

     

    the only secure way is to try on a F2 but you can image that it could be 32 times higher on F2. again you should also consider smoothing and bursting and maybe you can fit in an F2 because they smooth your workload avoiding spikes over 100%.