Production usage

Get your go-redis app ready for production

This guide offers recommendations to get the best reliability and performance in your production environment.

Checklist

Each item in the checklist below links to the section for a recommendation. Use the checklist icons to record your progress in implementing the recommendations.

Recommendations

The sections below offer recommendations for your production environment. Some of them may not apply to your particular use case.

Health checks

If your code doesn't access the Redis server continuously then it might be useful to make a "health check" periodically (perhaps once every few seconds). You can do this using a simple PING command:

err := rdb.Ping(ctx).Err()

if err != nil {
  // Report failed health check.
}

Health checks help to detect problems as soon as possible without waiting for a user to report them.

Error handling

The Result() method of a command returns both the command result and an error value. Although you are mainly interested in the result, you should also always check that the error value is nil before proceeding. Errors can be returned for failed connections, network problems, and invalid command parameters, among other things.

Monitor performance and errors

go-redis supports OpenTelemetry. This lets you trace command execution and monitor your server's performance. You can use this information to detect problems before they are reported by users. See Observability for more information.

Retries

go-redis will automatically retry failed connections and commands. By default, the number of attempts is set to three, but you can change this using the MaxRetries field of Options when you connect. The retry strategy starts with a short delay between the first and second attempts, and increases the delay with each attempt. The initial delay is set with the MinRetryBackoff option (defaulting to 8 milliseconds) and the maximum delay is set with the MaxRetryBackoff option (defaulting to 512 milliseconds):

client := redis.NewClient(&redis.Options{
    MinRetryBackoff: 10 * time.Millisecond,
    MaxRetryBackoff: 100 * time.Millisecond,
    MaxRetries: 5,
})

You can use the observability features of go-redis to monitor the number of retries and the time taken for each attempt, as noted in the Monitor performance and errors section above. Use this data to help you decide on the best retry settings for your application.

Timeouts

go-redis supports timeouts for connections and commands to avoid stalling your app if the server does not respond within a reasonable time. The DialTimeout field of Options sets the timeout for connections, and the ReadTimeout and WriteTimeout fields set the timeouts for reading and writing data, respectively. The default timeout is five seconds for connections and three seconds for reading and writing data, but you can set your own timeouts when you connect:

client := redis.NewClient(&redis.Options{
    DialTimeout:  10 * time.Second,
    ReadTimeout:  5 * time.Second,
    WriteTimeout: 5 * time.Second,
})

You can use the observability features of go-redis to monitor the frequency of timeouts, as noted in the Monitor performance and errors section above. Use this data to help you decide on the best timeout settings for your application. If timeouts are set too short, then go-redis might retry commands that would have succeeded if given more time. However, if they are too long, your app might hang unnecessarily while waiting for a response that will never arrive.