What sample rate sends metrics 100% of the time with DogStatsD over UDP?

In the context of DogStatsD, which is a tool used for collecting and sending metrics to Datadog using the User Datagram Protocol (UDP), the sample rate plays a crucial role in determining how frequently data is reported. A sample rate of 1 indicates that metrics are being sent 100% of the time, meaning every metric that is recorded will be transmitted to the Datadog servers without any sampling or omission.

When the sample rate is set to 1, it ensures that there are no missed data points, providing a complete picture of the application's performance and behavior. This is particularly important for critical metrics where full visibility is necessary for troubleshooting and monitoring.

In contrast, a sample rate of 0 would mean that no metrics are sent at all, while a sample rate of 0.5 would only send metrics half the time, and a rate of 2 would actually reduce the reporting frequency to every other occurrence. Therefore, a sample rate of 1 is the only option that ensures complete data transmission for effective monitoring and analysis.