maxrss maximum resident set size ixrss integral shared memory size idrss integral unshared data size isrss integral unshared stack size minflt page reclaims (soft page faults) majflt page faults (hard page faults) nswap swaps inblock block input operations oublock block output operations msgsnd IPC messages sent msgrcv IPC messages received nsignals signals received nvcsw voluntary context switches nivcsw involuntary context switches