Data reading method and device, storage medium and program product

The invention discloses a data reading method and device, a storage medium and a program product, and belongs to the technical field of computers. The method comprises the steps that: when a target service runs, the pre-read data hit rate of the target service during last running is obtained, and the pre-read data hit rate is the rate that data pre-read from a file system to a memory is accessed; then, according to the pre-read data hit rate, a first pre-read window threshold value is set, and the first pre-read window threshold value is the maximum data volume which can be pre-read in a single time when the data is pre-read from the file system to the memory in the current operation process of the target business; and finally, the data is pre-read from the file system to the memory according to the first pre-reading window threshold. In the application, the first pre-reading window threshold value depends on the pre-reading data hit rate, so that the pre-reading data volume of the target service in the curre