[DOC-10090][DOC-10093] v24.1.0 deprecations, backward-incompatible changes, licensing updates

[mdlinville]

[DOC-10090] v24.1.0 deprecations and backward-incompatible changes [DOC-10093] v24.1.0 licensing updates

• Also fix a display bug in v23.1.0 release notes

Relates to [DOC-10061]

Preview: releases/v24.1.md

[github-actions[bot]]

Files changed:

• src/current/_includes/releases/v23.1/v23.1.0.md:
  • releases/v23.1.md
• src/current/_includes/releases/v24.1/v24.1.0-alpha.1.md:
  • releases/v24.1.md
• src/current/_includes/releases/v24.1/v24.1.0.md:
  • releases/v24.1.md
• src/current/v24.1/licensing-faqs.md

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[taroface]

Here's my suggested addition:

The `sql.txn.read_committed_isolation.enabled` [cluster setting]({% link {{ page.version.version }}/cluster-setting.md %}) is now `true` by default. [`READ COMMITTED`]({% link {{ page.version.version }}/read-committed.md %}) transactions are no longer automatically upgraded to [`SERIALIZABLE`]({% link {{ page.version.version }}/demo-serializable.md %}), and will run as `READ COMMITTED`. As a result, upgrading CockroachDB may affect your application behavior. To see whether any transactions are being upgraded from weaker isolation levels to `SERIALIZABLE` on v23.2, check the [**Upgrades of SQL Transaction Isolation Level**]({% link {{ page.version.version }}/ui-sql-dashboard.md %}#upgrades-of-sql-transaction-isolation-level) graph in the DB Console. You may need to adjust those transactions before upgrading to v24.1.

If this needs to be associated with a PR, I think this should be the one: https://github.com/cockroachdb/cockroach/pull/118479

See: https://github.com/cockroachdb/cockroach/pull/118497 and this comment for context

[mdlinville]

Here's my suggested addition:

The `sql.txn.read_committed_isolation.enabled` [cluster setting]({% link {{ page.version.version }}/cluster-setting.md %}) is now `true` by default. [`READ COMMITTED`]({% link {{ page.version.version }}/read-committed.md %}) transactions are no longer automatically upgraded to [`SERIALIZABLE`]({% link {{ page.version.version }}/demo-serializable.md %}), and will run as `READ COMMITTED`. As a result, upgrading CockroachDB may affect your application behavior. To see whether any transactions are being upgraded from weaker isolation levels to `SERIALIZABLE` on v23.2, check the [**Upgrades of SQL Transaction Isolation Level**]({% link {{ page.version.version }}/ui-sql-dashboard.md %}#upgrades-of-sql-transaction-isolation-level) graph in the DB Console. You may need to adjust those transactions before upgrading to v24.1.

If this needs to be associated with a PR, I think this should be the one: cockroachdb/cockroach#118479

See: cockroachdb/cockroach#118497 and this comment for context

Thanks, PTAL, I took your wording and gave it a few nitpicky tweaks.