mistercrunch commented on issue #4666: Sessions still active on Datasource URL: https://github.com/apache/incubator-superset/issues/4666#issuecomment-375353394 SQLAlchemy uses connection pools by default and the whole purpose of those is to keep connections open for faster access to the database. That's desired for the metadata database. We used to also use pools for analytics query against external database but that's been switched off in more recent versions. Also FAB (Flask App Builder) is known to have session leakage issues. That's a FAB issue we should get to the bottom of at some point
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