Full form of QPS is Queries per Second

A performance metric used to measure how many queries a system can handle within one second. It is commonly applied in databases, search engines, APIs, and distributed systems to evaluate throughput under load. A query in this context refers to any request made to retrieve or process data, such as a database lookup or an API call.

Engineers and system architects rely on this metric to assess scalability and efficiency. Higher values generally indicate that a system can process more requests concurrently, which is critical for applications with high traffic or real time requirements. It is often tested using load simulation tools to understand how systems behave under stress and to identify bottlenecks.

Its importance lies in guiding infrastructure decisions and optimization efforts. By monitoring and improving this metric, teams can ensure smoother user experiences, faster response times, and reliable system performance even as demand grows.