* If buffer cloning becomes intense, then the popular chain will become very long, increasing CBC scan time.

Both of these situations will increase response time. Let's take a look at these unfortunate situations in more detail.

With a single latch, serialization is ensured, but concurrency is severely limited. All it takes is one other process requesting the latch while it's being held for contention to result. In this example, simply adding one more latch could solve the problem. Scale this out quite a bit by having hundreds or thousands of processes requiring access to the CBCs, and you can see the potential exists for serious performance-limiting concurrency issues.