Abstract: Upon reception of a request for a DB server 1 and a DB server 2, an accepting server issues the request to both the DB server 1 and the DB server 2 simultaneously.

Abstract: A tabular form screen on which input fields for a parameter and a set value can be added is used as a condition input screen. In a test pattern control part, set values of different parameter groups inputted via the condition input screen are arbitrarily combined, one set value group from each parameter group being selected for one combination, to automatically generate test patterns and parameter files which are information on the set values. An execution control section can control a server and a client terminal of an information processing system to execute performance tests successively only with one input operation based on the generated parameter files.

Abstract: By providing a performance metrics calculation section 4 for calculating a predetermined performance metrics determined in advance from at least part of data from among various condition data concerning a performance evaluation model, which are input from condition input sections 1 to 3, calculating the predetermined performance metrics from the input condition data, and performing performance prediction using not only the input data but also the calculation result, unlike inputting a performance metrics on the basis of the prediction of a developer, there is no room where experience, intuition, or the like, of the developer enters, and the performance of the system can be represented with very objective numerical values even if any person performs.

Abstract: A tabular form screen on which input fields for a parameter and a set value can be added is used as a condition input screen. In a test pattern control part, set values of different parameter groups inputted via the condition input screen are arbitrarily combined, one set value group from each parameter group being selected for one combination, to automatically generate test patterns and parameter files which are information on the set values. An execution control section can control a server and a client terminal of an information processing system to execute performance tests successively only with one input operation based on the generated parameter files.

Abstract: The invention relates to a process for producing L(-)-tetrahydrofolic acid which comprises allowing dihydrofolate reductase to act upon dihydrofolic acid in the presence of (1) NADP or NADPH, and (2) glucose and glucose dehydrogenase. L(-)-tetrahydrofolic acid is useful as the intermediate for L(-)-leucovarin.