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Add Postgres 18 to the Managed Postgres version docs - #2652
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New v2 Managed Postgres clusters can run Postgres 18. Update the pages that listed only 16 and 17, and stop naming a default version on the import page. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Summary of changes
Postgres 18 is now available for new Managed Postgres clusters on v2 clusters (v1 clusters still offer 16 and 17). This updates the pages that said MPG supports only 16 and 17:
postgres/extensions.mdx: front matter description and overview now list 16, 17 and 18, and say 18 is on v2 clusters only.postgres/index.mdx: the major version limitation now lists 16, 17 and 18.postgres/import.mdx: drops "(thefly mpg createdefault)", so the page no longer names a default version.The supported-extensions table is unchanged; see Notes.
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Related Fly.io community and GitHub links
fly mpg createand default to 17 flyctl#5445 letsfly mpg createaccept--pg-major-version 18. It isn't released yet, and this PR doesn't depend on it: these pages don't say the CLI can create an 18 cluster.api/machines/models.mdxstill says "Enum: 16, 17". It's generated from the Machines API OpenAPI spec, so the spec upstream needs 18.Notes
Verified on throwaway v2 clusters (Postgres 18.6 and 17, region
fra, since destroyed), using bothpg_available_extensionsandfly mpg databases extensions list, which agree:pg_logicalinspect(new in Postgres 18, a low-level inspection module likepg_walinspect, which the table also leaves out).old_snapshotis on neither, so "Postgres 16 only" still holds.Not verified: the PostGIS extensions on 18 (the test clusters had no PostGIS support), and v1 clusters.
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