Info on Radio link failure, intercell interference, UE measurements, MDT measurements, radio resource status, cell load signalling, etc.
Heuristic algorithms typically discard info after
Management information for long-term operation
Fault configuration, accounting, performance and security management (FCAPS), Operations and Management, e.g., in OAM aggregated statistics per eNB, on network performances, users, successful/failed HO, active bearers, information from active probing