- if (Config::get('system', 'worker_linear_load', false)) {
- /* The linear load calculation works fine if there is a low
- * number of maximum queues and a high load base level.
- * This can be present at shared hosters.
- */
- $tinyload = 1;
-
- if ($load > $maxsysload) {
- $queues = 0;
- } elseif ($load > $tinyload) {
- //Provide $queues number between 1 (below max load) and $maxqueues - 1 (above tiny load).
- $range = $maxsysload - $tinyload;
- $slope = 1.00 - (($load - $tinyload) / $range);
- $target = $slope * ($maxqueues - 1);
- $queues = intval(ceil($target));
- }
- } else {
- /* The exponentional load calculation respects the load behaviour
- * of Linux systems with regular hardware that normally idles
- * with load values near 0.
- */
- $maxworkers = $queues;
-
- // Some magical mathemathics to reduce the workers
- $exponent = 3;
- $slope = $maxworkers / pow($maxsysload, $exponent);
- $queues = ceil($slope * pow(max(0, $maxsysload - $load), $exponent));
- }
+ /* Default exponent 3 causes queues to rapidly decrease as load increases.
+ * If you have 20 max queues at idle, then you get only 5 queues at 37.1% of $maxsysload.
+ * For some environments, this rapid decrease is not needed.
+ * With exponent 1, you could have 20 max queues at idle and 13 at 37% of $maxsysload.
+ */
+ $exponent = intval(Config::get('system', 'worker_load_exponent', 3));
+ $slope = pow(max(0, $maxsysload - $load) / $maxsysload, $exponent);
+ $queues = intval(ceil($slope * $maxqueues));