### How this function works This function will help you to reduce the cool start of your callable functions. ### Prerequisites * You should have previous knowledge of **Pub/Sub**. * Previous knowledge of GCP **Cloud Scheduler** is recommended. ### Function details The function will be triggered by a Pub/Sub event published with the specific topic `KEEP_CALLABLES_WARM`. The message should contain the array of trigger URLs of the callables functions that you want to keep warm. > It’s recommended to use GCP Cloud Scheduler to run this function every few minutes and thus keep the callable functions warm. These callable functions must be implemented with our **keepWarm** policy. To install this function, add the required info to the form with the following parameters: - **WARM_PROP**: The name of the warm prop. ### Resources - [GCP Cloud Scheduler](https://cloud.google.com/scheduler)