Update Rails isolation_level docs with new learnings #221
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Following up on #220 after encountering unexpected errors when retaining
isolation_level = :threadin a high-traffic production application being upgraded from Rails 7.0.8 -> 7.1.3.My suggestion is to leave the documentation mostly in place, but to clarify that retaining
:threadis not recommended after my practical experience. See #220 (comment) for a bit more detail including the types of errors I was seeing in production.Types of Changes
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