Abstract: A task count controller, a task count control method, and a computer program capable of dynamically controlling the number of tasks that can be processed in parallel simultaneously without increasing computational load are provided. When a plurality of tasks are to be executed simultaneously in parallel processing, the number of tasks that can be executed simultaneously is controlled. The tasks to be executed simultaneously are added in units of a predetermined number of tasks and the throughput in one unit of work is measured for each task every time the tasks are added. The total sum of the measured throughputs is calculated, and it is determined whether the calculated total sum of throughputs is more than the total sum of throughputs immediately before the predetermined number of tasks are added.

Abstract: Method for generating an alternate logical database structure of a hierarchical database by a computing device, includes: determining a target level of a physical hierarchical database structure corresponding to a root level of a logical hierarchical database structure; accessing a current level of the physical hierarchical database structure equal to the target level; decrementing the current level by the computing device; accessing the decremented current level of the physical hierarchical database structure; and in response to determining that the decremented current level is a root level of the physical hierarchical database structure, repositioning the current level to the target level. In response to determining that the decremented current level is not the root level of the physical hierarchical database structure, repeating the decrementing of the current level and the accessing of the decremented current level of the physical hierarchical database structure by the computing device.

Abstract: A task count controller, a task count control method, and a computer program capable of dynamically controlling the number of tasks that can be processed in parallel simultaneously without increasing computational load are provided. When a plurality of tasks are to be executed simultaneously in parallel processing, the number of tasks that can be executed simultaneously is controlled. The tasks to be executed simultaneously are added in units of a predetermined number of tasks and the throughput in one unit of work is measured for each task every time the tasks are added. The total sum of the measured throughputs is calculated, and it is determined whether the calculated total sum of throughputs is more than the total sum of throughputs immediately before the predetermined number of tasks are added.