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22 changes: 16 additions & 6 deletions products/managed-postgres/upgrades.mdx
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Expand Up @@ -13,16 +13,26 @@ import PrivatePreviewBadge from "/snippets/components/PrivatePreviewBadge/Privat

Managed Postgres handles PostgreSQL version upgrades to keep your instances secure and up to date. Both minor and major version upgrades are supported with minimal disruption.

## Minor version upgrades {#minor-version-upgrades}
## Maintenance updates {#maintenance-updates}

Minor version upgrades (e.g., 16.4 to 16.5) include bug fixes and security patches. These are performed via failover and typically result in only a brief disconnect, often lasting just a few seconds.
Regular maintenance in the PostgreSQL instances includes the following:

For instances with [standbys](/products/managed-postgres/high-availability) enabled, the upgrade is applied to the standby first, followed by a failover to minimize downtime.
- Minor version upgrades (e.g., 17.4 to 17.5) include bug fixes and PostgreSQL engine security patches.
- Managed Service features. Improvements to native CDC, observability, pg_clickhouse, and other extensions.
- Operating system and system components patches. Including security fixes, efficiency, and other improvements.

## Major version upgrades {#major-version-upgrades}
These are performed via failover and typically result in only a brief disconnect, often lasting just a few seconds.

Major version upgrades (e.g., 16.x to 17.x) also involve only a few seconds of downtime, following a similar failover-based approach.
For instances with [standbys](/products/managed-postgres/high-availability) enabled, the upgrade is applied to the standby first, followed by a failover to minimize downtime.

## Maintenance windows {#maintenance-windows}

Managed Postgres supports maintenance windows so that upgrades and other maintenance operations can be scheduled at a time that's least disruptive to your workload. UI support for configuring maintenance windows is coming soon. In the meantime, contact [support](https://clickhouse.com/support/program) to set up a maintenance window for your instance.
Default maintenance window is 14:00 to 16:00 UTC on Sunday.
Expected downtime is less than 1 minute within the window.

For Enterprise Tier organizations, Managed Postgres supports maintenance windows so that upgrades and other maintenance operations can be scheduled at a time that's least disruptive to your workload. UI and API support for configuring maintenance windows is coming soon. In the meantime, contact [support](https://clickhouse.com/support/program) to set up a maintenance window for your instance.

## Major version upgrades {#major-version-upgrades}

Major version upgrades (e.g., 17.x to 18.x) via UI and API are coming soon.
In the meantime, contact [support](https://clickhouse.com/support/program) to upgrade your Managed Postgres instance.