Method, server and computer-readable recording medium for managing size of thread pool dynamically

A method for managing a size of a thread pool dynamically is disclosed. The method includes the steps of: (a) a processor increasing a maximum thread size if the number of threads included in the thread pool is close to the maximum thread size; and (b) the processor comparing a size of a task queue before the increase of the maximum thread size with that after the increase thereof by referring to information on the size of the task queue, and increasing the maximum thread size again if the size of the task queue after the increase thereof is larger than, or equal to, that before the increase thereof.