What configuration allows limiting the number of instances in an App Engine standard environment?

In the context of limiting the number of instances in an App Engine standard environment, defining instances using Basic scaling is particularly effective. With Basic scaling, you can specify a limit on the number of instances that can be deployed. This is useful for controlling costs and resource utilization, as it ensures that no more instances than necessary are running at any given time.

When configuring Basic scaling, you can set parameters such as the maximum number of instances, which directly influences how your application can scale in response to incoming traffic. This helps to manage workloads efficiently, allowing for flexibility up to the defined limit based on demand.

The other scaling options, while they offer different benefits, do not specifically focus on setting a cap on the number of instances as directly and effectively as the Basic scaling option does with instance definitions. For example, manual scaling allows you to control the number of instances but does not inherently provide the dynamic response to traffic that Basic scaling does.