Recently, we observed a couple of eviction issues where the update fill ratio is reaching 30% of the cache size, which is more than the dirty fill ratio of 20%.

The eviction server is not picking the correct pages as part of the eviction walk to reduce the update fill ratio. This is leading to the involvement of application threads in eviction and causing the latency issues.

Add statistics in the eviction server code flow to understand why the eviction server is not picking the correct pages that have updates to reduce the update fill ratio.