The App Engine standard environment is based on container instances running on Google's infrastructure. Containers are preconfigured with one of several available runtimes.
The App Engine standard environment makes it easy to build and deploy an application that runs reliably even under heavy load and with large amounts of data.
Applications run in a secure, sandboxed environment, allowing the App Engine standard environment to distribute requests across multiple servers, and scaling servers to meet traffic demands. Your application runs within its own secure, reliable environment that is independent of the hardware, operating system, or physical location of the server.
Standard environment languages and runtimes
The standard environment supports the following languages:
Instance classes
Each application running in the standard environment has an instance class, which determines its compute resources and pricing. The memory and CPU limits of instances varies by the runtime generation. See the pricing page for billing information.
Second gen runtimes
Second generation runtimes are: Python 3.7, Java 11, Node 8, Node 10 PHP 7.2, PHP 7.3, Ruby 2.5, Go 1.11, and Go 1.12.
| Instance Class | Memory Limit | CPU Limit | Supported Scaling Types |
|---|---|---|---|
| F1 (default) | 256 MB | 600 MHz | automatic |
| F2 | 512 MB | 1.2 GHz | automatic |
| F4 | 1024 MB | 2.4 GHz | automatic |
| F4_HIGHMEM | 2048 MB | 2.4 GHz | automatic |
| B1 | 256 MB | 600 MHz | manual, basic |
| B2 (default) | 512 MB | 1.2 GHz | manual, basic |
| B4 | 1024 MB | 2.4 GHz | manual, basic |
| B4_HIGHMEM | 2048 MB | 2.4 GHz | manual, basic |
| B8 | 2048 MB | 4.8 GHz | manual, basic |
First gen runtimes
First generation runtimes are: Python 2.7, Java 8, Go 1.9, and PHP 5.5.
| Instance Class | Memory Limit | CPU Limit | Supported Scaling Types |
|---|---|---|---|
| F1 (default) | 128 MB | 600 MHz | automatic |
| F2 | 256 MB | 1.2 GHz | automatic |
| F4 | 512 MB | 2.4 GHz | automatic |
| F4_HIGHMEM | 1024 MB | 2.4 GHz | automatic |
| B1 | 128 MB | 600 MHz | manual, basic |
| B2 (default) | 256 MB | 1.2 GHz | manual, basic |
| B4 | 512 MB | 2.4 GHz | manual, basic |
| B4_HIGHMEM | 1024 MB | 2.4 GHz | manual, basic |
| B8 | 1024 MB | 4.8 GHz | manual, basic |
Quotas and limits
The App Engine standard environment gives you 1 GB of data storage and traffic for free, which can be increased by enabling paid applications. However, some features impose limits unrelated to quotas to protect the stability of the system. For more details on quotas, including how you can edit them to suit your needs, see Quotas.
