Changes in MySQL Router 9.7.0 (2026-04-21)

Note

These release notes were created with the assistance of MySQL HeatWave GenAI.

Functionality Added or Changed

• MySQL Router host_cache is introduced in this release. This plugin is an in-process DNS and host cache which reduces resolver work, improves connection handling, and provides observability into problematic connection behaviour.

  The host_cache is enabled by default and can be configured using the following configuration parameters:

  • enabled:

  • max_entries:

  • ttl_success_seconds:

  • ttl_negative_seconds:

  • ttl_jitter_ratio:

  Observability is provided by the REST API. See host_cache. (WL #17272)