How Can I Efficiently Manage Database Connections in My Go Web API?

Managing Database Connections Efficiently in Go Applications

In your web API app, each function currently establishes its own connection to the Postgres database, which raises concerns about resource utilization and performance. This approach can be improved to enhance the efficiency of your application.

The preferred method is to initialize a single sql.DB instance upon application startup. This instance can be passed as an argument to functions that require database access or made available as a global variable. According to the sql.Open() documentation, "The returned DB is safe for concurrent use by multiple goroutines and maintains its own pool of idle connections."

To initialize the sql.DB instance, you can use a package init() function:

package main

import (
    "fmt"
    "log"

    "github.com/lib/pq"
)

var db *sql.DB

func init() {
    var err error
    dbURI := "user=postgres password=password dbname=api_dev sslmode=disable"
    db, err = sql.Open("postgres", dbURI)
    if err != nil {
        log.Fatal("Invalid DB config:", err)
    }
    if err = db.Ping(); err != nil {
        log.Fatal("DB unreachable:", err)
    }
}

func main() {
    fmt.Println("Initialized DB connection successfully")
}

This approach eliminates the overhead of establishing multiple connections and ensures efficient resource management. The db.Ping() call verifies that the database is accessible.

By following this strategy, your web API app can handle database connections more efficiently, minimizing resource utilization and improving performance.

The above is the detailed content of How Can I Efficiently Manage Database Connections in My Go Web API?. For more information, please follow other related articles on the PHP Chinese website!