Linux: system()来自一个内存密集型的进程，没有分叉

I have a large C++ process (35+ GB RAM usage) on a 60 GB Linux machine which needs to system() to perform some functionality. However, because system() internally forks and execs the new process, it requires virtual memory space which is double the original process's RAM.I have a large C++ process (35+ GB RAM usage) o