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MDL-67596 cron: Allow runners to ramp up instantly

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This commit is contained in:
Brendan Heywood
2020-01-09 11:07:19 +11:00
parent 4d5849b0e4
commit 1f5c6c6b7a
1 changed files with 8 additions and 2 deletions
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lib/cronlib.php
+8 -2
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@@ -96,7 +96,10 @@ function cron_run_scheduled_tasks(int $timenow) {
$scheduledlock = null;
for ($run = 0; $run < $maxruns; $run++) {
if ($scheduledlock = $cronlockfactory->get_lock("scheduled_task_runner_{$run}", 1)) {
// If we can't get a lock instantly it means runner N is already running
// so fail as fast as possible and try N+1 so we don't limit the speed at
// which we bring new runners into the pool.
if ($scheduledlock = $cronlockfactory->get_lock("scheduled_task_runner_{$run}", 0)) {
break;
}
}
@@ -137,7 +140,10 @@ function cron_run_adhoc_tasks(int $timenow) {
$adhoclock = null;
for ($run = 0; $run < $maxruns; $run++) {
if ($adhoclock = $cronlockfactory->get_lock("adhoc_task_runner_{$run}", 1)) {
// If we can't get a lock instantly it means runner N is already running
// so fail as fast as possible and try N+1 so we don't limit the speed at
// which we bring new runners into the pool.
if ($adhoclock = $cronlockfactory->get_lock("adhoc_task_runner_{$run}", 0)) {
break;
}
}