Fix: Corected config value name

config/defaults.config.php

@@ -397,9 +397,9 @@ return [
 		// If enabled, it prints out the jobs per minute.
 		'worker_jpm' => false,
 
-		// worker_jpm_limit (String)
+		// worker_jpm_range (String)
 		// List of minutes for the jobs per minute (JPM) calculation
-		'worker_jpm_limit' => '1, 10, 60',
+		'worker_jpm_range' => '1, 10, 60',
 
 		// worker_load_exponent (Integer)
 		// Default 3, which allows only 25% of the maximum worker queues when server load reaches around 37% of maximum load.

src/Core/Worker.php

@@ -718,6 +718,12 @@ class Worker
 				$intervals = explode(',', Config::get('system', 'worker_jpm_range'));
 				$jobs_per_minute = [];
 				foreach ($intervals as $interval) {
+					if ($interval == 0) {
+						continue;
+					} else {
+						$interval = (int)$interval;
+					}
+
 					$stamp = (float)microtime(true);
 					$jobs = DBA::p("SELECT COUNT(*) AS `jobs` FROM `workerqueue` WHERE `done` AND `executed` > UTC_TIMESTAMP() - INTERVAL ? MINUTE", $interval);
 					self::$db_duration += (microtime(true) - $stamp);