What adjustment should be made to improve application response latency during instance scaling in a Compute Engine instance group?

Improving application response latency during instance scaling in a Compute Engine instance group can be effectively accomplished by decreasing the cool-down period for instances added to the group.

When an instance group scales up, new instances are added to handle increased load. However, when the cool-down period is too long, there may be a delay before these new instances can begin servicing requests. This delay can lead to higher response times during peak usage, as the existing instances may be overwhelmed while waiting for the new instances to be considered ready. By reducing the cool-down period, the autoscaler can allow new instances to immediately start serving traffic, thereby improving overall application response latency as they become available to handle requests more quickly.

This approach enables resources to be utilized more effectively and enhances the responsiveness of the application under varying loads.