How frequently does the Salesforce server check for new notifications when the Streaming API is in use?

The Streaming API in Salesforce is designed to provide a low-latency mechanism for clients to receive real-time notifications of changes to Salesforce data. This functionality is critical for applications that require immediate updates in response to data changes.

When the Streaming API is used, the Salesforce server checks for new notifications every three seconds. This interval allows for a balance between timely updates and resource utilization, ensuring that the server does not get overloaded with too frequent polling. This design choice supports the efficient operation of both the server and clients interacting with it, ensuring that applications can provide up-to-date information without excessive network traffic or server load.

Understanding this polling frequency is crucial for architects as they design solutions that integrate Salesforce data in real-time, allowing for optimal performance and user experience.