Couchbase 6.6 introduces significant enhancements to its Eventing Service, offering improved functionality such as the ability to cancel Eventing Timers using the cancelTimer() function or by creating a new timer with the same reference identifier. The update supports recurring timers, allowing for complex, repetitive logic and enabling timers to be scheduled well into the future without performance drawbacks. The OnDelete Handler now distinguishes between document deletions and expirations, enhancing logic execution based on document removal type. Additionally, key Eventing statistics are integrated with each function's lifecycle controls in the UI, facilitating easier diagnosis and implementation of robust business logic. These improvements simplify the development process and optimize the performance of Eventing Functions, making it easier to implement sophisticated business logic with fewer resources.