Sayan Datta

<p>The WP-Cron system in WordPress is not a “real” cron system, which means events may not run exactly according to their schedule because the system relies on regular traffic to the website in order to trigger scheduled events.</p>
<h3>Reasons WP-Cron events can miss their schedule</h3>
<ul>
<li>Low traffic websites may not trigger the event runner often enough</li>
<li>A fatal error caused by a plugin or theme may break the event runner</li>
<li>A plugin or theme may intentionally or unintentionally break the event runner</li>
<li>BasicAuth, a firewall, or other access restrictions may block the event runner</li>
<li>A problem with your web hosting or web server may break the event runner</li>
<li>The <code>DISABLE_WP_CRON</code> configuration constant is set but no alternative cron runner has been put in place</li>
<li>Long-running events may temporarily block the event runner</li>
<li>High traffic websites may suffer from sequential processing issues that block the event runner</li>
</ul>
<p>The Advanced Cron Scheduler for WordPress plugin does alter the way that WordPress core runs cron events using the Action Scheduler Library.</p>
<p>Action Scheduler is a scalable, traceable job queue for background processing large sets of actions in WordPress. It’s specially designed to be distributed in WordPress plugins.</p>
<p>Action Scheduler works by triggering an action hook to run at some time in the future. Each hook can be scheduled with unique data, to allow callbacks to perform operations on that data. The hook can also be scheduled to run on one or more occassions.</p>
<p>Think of it like an extension to <code>do_action()</code> which adds the ability to delay and repeat a hook.</p>
<h3>Battle-Tested Background Processing</h3>
<p>Every month, Action Scheduler processes millions of payments for <a href="https://woocommerce.com/products/woocommerce-subscriptions/" rel="nofollow ugc">Subscriptions</a>, webhooks for <a href="https://wordpress.org/plugins/woocommerce/" rel="ugc">WooCommerce</a>, as well as emails and other events for a range of other plugins.</p>
<p>It’s been seen on live sites processing queues in excess of 50,000 jobs and doing resource intensive operations, like processing payments and creating orders, at a sustained rate of over 10,000 / hour without negatively impacting normal site operations.</p>
<p>This is all on infrastructure and WordPress sites outside the control of the plugin author.</p>
<p>If your plugin needs background processing, especially of large sets of tasks, Action Scheduler can help.</p>
<h3>Learn More</h3>
<p>To learn more about how to Action Scheduler works, and how to use it in your plugin, check out the docs on <a href="https://actionscheduler.org" rel="nofollow ugc">ActionScheduler.org</a>.</p>
<p>There you will find:</p>
<ul>
<li><a href="https://actionscheduler.org/usage/" rel="nofollow ugc">Usage guide</a>: instructions on installing and using Action Scheduler</li>
<li><a href="https://actionscheduler.org/wp-cli/" rel="nofollow ugc">WP CLI guide</a>: instructions on running Action Scheduler at scale via WP CLI</li>
<li><a href="https://actionscheduler.org/api/" rel="nofollow ugc">API Reference</a>: complete reference guide for all API functions</li>
<li><a href="https://actionscheduler.org/admin/" rel="nofollow ugc">Administration Guide</a>: guide to managing scheduled actions via the administration screen</li>
<li><a href="https://actionscheduler.org/perf/" rel="nofollow ugc">Guide to Background Processing at Scale</a>: instructions for running Action Scheduler at scale via the default WP Cron queue runner</li>
</ul>
<h3>Support</h3>
<ul>
<li>Community support via the <a href="https://wordpress.org/support/plugin/migrate-wp-cron-to-action-scheduler/" rel="ugc">support forums</a> at WordPress.org.</li>
</ul>
<h3>Contribute</h3>
<ul>
<li>Active development of this plugin is handled <a href="https://github.com/iamsayan/advanced-cron-scheduler/" rel="nofollow ugc">on GitHub</a>.</li>
<li>Feel free to <a href="https://github.com/iamsayan/advanced-cron-scheduler/" rel="nofollow ugc">fork the project on GitHub</a> and submit your contributions via pull request.</li>
</ul>
<h3>Credits</h3>
<p>Action Scheduler is developed and maintained by <a href="http://automattic.com/" rel="nofollow ugc">Automattic</a>.</p>


Advanced Cron Scheduler for WordPress

The Advanced Cron Scheduler for WordPress plugin helps to easily replace or migrate Native WordPress Cron to the Action Scheduler Library.

Kuba Mikita

BracketSpace

<p>With Advanced Cron Manager you can manage WP Cron events:</p>
<ul>
<li>view all registered events and their arguments nicely formatted</li>
<li><em>search</em> events</li>
<li>execute manually any event</li>
<li>add new events</li>
<li><em>pause</em> events</li>
<li>delete (unschedule) events</li>
<li>ready-to-copy-paste PHP implementation for each event</li>
<li>bulk actions on events</li>
<li>block WP Cron spawning and get instructions how to set Server Scheduler</li>
</ul>
<p>and schedules:</p>
<ul>
<li>view all registered schedules</li>
<li>add new schedules</li>
<li>edit schedules</li>
<li>remove schedules</li>
</ul>
<p>Plugin use AJAX request so you’ll need enabled Javascript in order to use it.</p>
<h4>Advanced Cron Manager PRO</h4>
<p>PRO version includes</p>
<ul>
<li>Better event planning – You can add a custom schedule that will fire your events at a specific time, ie. at noon on the last day of the month, or only Fridays</li>
<li>Cron Logger – log cron’s execution times easily</li>
<li>Events rescheduling – change event next execution date to control server load</li>
<li>Event listeners – you can see what functions or methods are listening for a particular event</li>
<li>Error catcher – catch cron task’s fatal errors and get them displayed in the log</li>
<li>Performance stats – see how much time and memory particular event took</li>
<li>Debug tool – log any useful information from Cron callback</li>
</ul>
<p><a href="https://bracketspace.com/downloads/advanced-cron-manager-pro/?utm_source=wporg&utm_medium=readme&utm_campaign=readme" title="Advanced Cron Manager PRO" rel="nofollow ugc">Buy now</a></p>
<h4>Information about WP Cron</h4>
<p>Please remember – after deactivation of this plugin added Schedules will be not available. Added Events will still work.</p>
<p>Important – WordPress Cron is depended on the User. WP Cron fires only on the page visit so it can be inaccurate.</p>
<h4>Custom Development</h4>
<p>BracketSpace – the company behind this plugin provides <a href="https://bracketspace.com/custom-development/" rel="nofollow ugc">custom WordPress plugin development services</a>. We can create any custom plugin for you.</p>


Advanced Cron Manager – debug & control

Thank you for this plugin. I'm liking it better than what I used to use. Excellent interface.

Advanced Cron Scheduler for WordPress vs Advanced Cron Manager – debug & control