Set connection pool and overflow limits when using SQLAlchemy

Configure the connection pool size and overflow when connecting to Cloud SQL for PostgreSQL by using SQLAlchemy.

Explore further

For detailed documentation that includes this code sample, see the following:

• Manage database connections

Code sample

Python

To authenticate to Cloud SQL for PostgreSQL, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

# Pool size is the maximum number of permanent connections to keep.
pool_size=5,
# Temporarily exceeds the set pool_size if no connections are available.
max_overflow=2,
# The total number of concurrent connections for your application will be
# a total of pool_size and max_overflow.

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