You can increase the resources allocated to your production environment's application and services by increasing the Project Plan Size.
Go to your project's Settings page and click Edit plan. From there, you can increase the size of the project, which will redeploy the project's containers to larger sizes.
Note: This process can only be done by the project owner.
For more information on this feature, please see the following page in the Platform.sh documentation:
https://docs.platform.sh/administration/pricing.html#switch-plans