WordPress Cron and Scheduled Tasks

WordPress uses a virtual cron system (WP-Cron) for scheduled tasks like publishing, updates, and backups.

How WP-Cron Works

WP-Cron runs on page visits, not at exact times. This means:

• Tasks run when someone visits your site
• Low-traffic sites may have delayed cron jobs
• High-traffic sites may run cron too often

Improving WP-Cron

For reliable scheduling, disable WP-Cron and use a real server cron:

Step 1: Disable WP-Cron

Add to wp-config.php:

define('DISABLE_WP_CRON', true);

Step 2: Create Server Cron

In cPanel → Cron Jobs, add:

*/15 * * * * /usr/local/bin/php /home/username/public_html/wp-cron.php > /dev/null 2>&1

This runs WP-Cron every 15 minutes reliably.

Common WP-Cron Tasks

• Scheduled posts: Publishing at set times
• Plugin updates: Checking for new versions
• Backups: UpdraftPlus, BackupBuddy schedules
• Email digests: Newsletter plugins
• Cache clearing: Periodic cache purges

Viewing Scheduled Cron Jobs

Install the WP Crontrol plugin to:

• See all scheduled events
• Edit cron schedules
• Add or remove cron jobs
• Debug failed cron tasks

Troubleshooting

• Scheduled posts not publishing: Enable real cron (above)
• Duplicate cron entries: Use WP Crontrol to clean up
• Cron running too often: Check for plugins adding excessive schedules