Abstract: Concurrent processing capability is the number of online transactions of online realtime processing system at the same time, concurrent processing for different applications is of different indicators， associated with the physical capacity of application system at the same time. In addition, concurrent processing capability is also closely associated with the complexity of business application system. Commercial bank financial information system mainly includes card business, discount business, exchange, inquiry, product management, finally, fixed units, parameter management, access management, front subsystems such as counter channel， the analysis of online concurrent processing capability of the above business can determine the technology parameters of configuration properties such as system host, storage, network equipment, firewalls, LAN switches, which is of reference value to the commercial bank information system construction.

Key words: concurrent processing, online trading, complexity of business, relationship, configuration properties