{serverload}

serverload prints the host machine current system load average - the one-minute figure the operating system reports (the same number shown as the first value by the Unix uptime and top tools). It is roughly how many processes were running or waiting to run on the CPU, averaged over the last minute, so a value near the number of CPU cores means the machine is busy but keeping up, and a much larger value means it is overloaded. The command takes no parameters and reads nothing from the database; it just asks the server for that single number and returns it as text. The result is never cached and is recomputed on every request, so it changes from one page render to the next and differs from server to server. On a platform that does not report a load average it returns 0. Use it only for diagnostics or an admin status page, never as the value of a test, because it is non-deterministic by nature.