To address you issue, I would advise you to use one of these solutions:

In-Place Resource Resize which allows you to adjust CPU and memory for running applications without needing to restart them, which is particularly useful for managing varying resource needs during different phases of your app's lifecycle.

Kube Startup CPU Boost from Google which is a tool that temporarily increases CPU resources during the startup phase of your applications and then reduces them once the applications are stable.

Kyverno Policies can also be used to automatically adjust resources based on the application's status. For example, you can create a policy that reduces CPU resources once the application reaches a ready state.

Dynamic Resource Allocation DRA which can also be useed to manage various types of resources, including CPUs and GPUs, through ResourceClaims and ResourceClaimTemplates