One of the things I like about FreeBSD is it has better rusage accounting than Linux. For example, FreeBSD and NetBSD actually fill in the following fields when

One of the things I like about FreeBSD is it has better rusage accounting than Linux. For example, FreeBSD and NetBSD actually fill in the following fields when you call wait4() on a process. int64_t ru_ixrss; /* shared memory size (integral kb CLK_TCK) */ int64_t ru_idrss; /* unshared data size (integral kb CLK_TCK) */ int64_t ru_isrss; /* unshared stack size (integral kb CLK_TCK) */ int64_t ru_inblock; /* block input operations */ int64_t ru_oublock; /* block output operations */ int64_t ru_nsignals; /* signals received */ int64_t ru_msgsnd; /* IPC messages sent */ int64_t ru_msgrcv; /* IPC messages received */ Linux doesn't give you that information. Since FreeBSD does, it's easier to do something like write a reliable network server that monitors worker behavior.