Application scenarios include: 1. Early warning web processing performance degradation; and positioned to cause an abnormal HTTP session; 2. The alert HTTP error return code is incremented; and is located to the HTTP session that caused the error; 3. Sorting the URL with the longest processing time; 4. Sorting the URL with the most error return codes; 5. Record and query every HTTP user's access; 6. Backtracking analysis of the operating rules of Web access. Performance KQI for Web/HTTP include: 1. HTTP processing delay; 2. URL transmission delay; 3. Server/client link communication delay; 4. Server/client handshake delay; 5. HTTP session return code ratio.