+ $maxsysload_frontend = intval(get_config('system','maxloadavg_frontend'));
+ if($maxsysload_frontend < 1)
+ $maxsysload_frontend = 50;
+ if(function_exists('sys_getloadavg')) {
+ $load = sys_getloadavg();
+ if(intval($load[0]) > $maxsysload_frontend) {
+ logger('system: load ' . $load[0] . ' too high. Service Temporarily Unavailable.');
+ header($_SERVER["SERVER_PROTOCOL"].' 503 Service Temporarily Unavailable');
+ header('Retry-After: 300');
+ die("System is currently unavailable. Please try again later");
+ }
+ }
+
+