Hi,

It seems you are setting the retention period to 0 hours.

You need to first use this config spark.databricks.delta.retentionDurationCheck.enabled to false.

and then set the retentention duration config as you used.

You can do a DRY RUN to check if there are any files which are ready to be vacummed.

Reference link: https://docs.databricks.com/en/sql/language-manual/delta-vacuum.html