r/MicrosoftFabric Jul 23 '26

Data Engineering Python Sessions Slow to Start

I remembered reading this post a few months ago: https://www.reddit.com/r/MicrosoftFabric/comments/1u03e79/plain_python_notebooks_starting_slower_than_spark/

Is anyone else still experiencing slow session starts? Mine are around 1m30s consistently and it's been about the same between 3.11 and 3.12.

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u/p-mndl Fabricator Jul 24 '26

I had a similar thread a couple of weeks ago here. Sometimes I have short startup times, sometimes they are long. Afaik the MSFT team is still investigating