This read-only integer reports the highest number of FTP request slots the agent has had in use at one time. Because managers must explicitly delete completed requests, this high-water mark can look artificially large if old completed rows are simply left in the table rather than cleaned up. For example, an admin seeing ftpClientHighRequests at 20 (the maximum) might realize old completed transfers are piling up rather than being deleted, rather than assuming 20 simultaneous transfers are still active.