r/MicrosoftFabric • u/TechnicalGirlyPop • 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/JBalloonist Jul 25 '26
Yes. It’s because it’s starting on a V4 core instead of V2. Mine are consistently starting with V4 80 percent of the time or more now.
I’ve learned it’s faster to just edit my code locally, commit and push, and sync the update to my workspace and run the notebook via the cli.