内存占用的大小直接影响程序的运行，对于一些内存占用很多的程序，需要实时检测可用内存，以调整设置，本程序就能实现这种功能-Memory footprint size of a direct impact on the operation of the procedure, for some memory footprint a lot of procedures, the need for real-time detection of memory can be used to adjust th