CockroachDB's new feature, Admission Control, introduced in version 22.1, effectively addresses CPU imbalance issues by optimizing CPU utilization across nodes in a cluster, as demonstrated by a successful upgrade from version 21.1.11. The feature was tested on a workload involving 200 different queries, where initially one node operated at near 100% CPU, leading to performance issues. After a zero-downtime upgrade and activation of Admission Control via a few SQL commands, there was a noticeable improvement in CPU utilization, with all three nodes operating within a 3% range of one another, showcasing the feature's efficacy. This improvement highlights the innovative and thoughtful development by Cockroach Labs, encouraging users to explore the new functionalities offered in the latest release to enhance performance and stability.