Running Bun in production using PostgreSQL

database/sql

Bun uses sql.DB to communicate with database management systems. You should create one sql.DB and one bun.DB when your app starts and close them when your app exits.

The sql package creates and frees connections automatically; it also maintains a pool of idle connections. To maximize pool performance, you can configure sql.DB to not close idle connections:

maxOpenConns := 4 * runtime.GOMAXPROCS(0)
sqldb.SetMaxOpenConns(maxOpenConns)
sqldb.SetMaxIdleConns(maxOpenConns)

bun.WithDiscardUnknownColumns

To make your app more resilient to errors during migrations, you can tweak Bun to discard unknown columns in production:

db := bun.NewDB(sqldb, pgdialect.New(), bun.WithDiscardUnknownColumns())

PostgreSQL

See PostgreSQL section.

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