It's faster without locks, gnarl ...

include/poller.php

@@ -88,6 +88,7 @@ function poller_run($argv, $argc){
 		// If we got that queue entry we claim it for us
 		if (!poller_claim_process($r[0])) {
 			Lock::remove('poller_fetch_worker');
+			usleep(rand(0, 200000));
 			continue;
 		} else {
 			// Fetch all workerqueue data while the table is still locked
@@ -95,7 +96,6 @@ function poller_run($argv, $argc){
 			$entries = poller_total_entries();
 			$top_priority = poller_highest_priority();
 			$high_running = poller_process_with_priority_active($top_priority);
-			Lock::remove('poller_fetch_worker');
 		}
 
 		// To avoid the quitting of multiple pollers only one poller at a time will execute the check
@@ -616,10 +616,6 @@ function poller_worker_process() {
 	// Check if we should pass some low priority process
 	$highest_priority = 0;
 
-	if (!Lock::set('poller_fetch_worker')) {
-		return false;
-	}
-
 	if (poller_passing_slow($highest_priority)) {
 		// Are there waiting processes with a higher priority than the currently highest?
 		$r = q("SELECT * FROM `workerqueue`
@@ -647,11 +643,6 @@ function poller_worker_process() {
 		$r = q("SELECT * FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority`, `created` LIMIT 1", dbesc(NULL_DATE));
 	}
 
-	// We only unlock the tables here, when we got no data
-	if (!dbm::is_result($r)) {
-		Lock::remove('poller_fetch_worker');
-	}
-
 	return $r;
 }