Caffeine cache metrics don't work with caches created via spring.cache.cache-names as the caches don't seem to record statistics.
See https://github.com/izeye/spring-boot-throwaway-branches/tree/cache-caffeine for a sample project to reproduce this.
If a custom Caffeine bean with recordStats() is provided, the metrics work.
See https://github.com/izeye/spring-boot-throwaway-branches/tree/cache-caffeine-custom for an updated one.
Comment From: dreis2211
Don't you have to configure spring.cache.caffeine.spec=recordStats?
Comment From: izeye
@dreis2211 Thanks! You're right.
Sorry for the noise.
Comment From: snicoll
Thanks @dreis2211
@izeye Spring Boot exposes cache metrics if available but does not enable cache metrics automatically.