wp-cron.php – High CPU usage

What is wp-cron.php ?

This file is a PHP script which runs all the automated tasks that let WordPress do all itโ€™s wonderful tricks. Some examples include:

 

  • Posting content when it is scheduled to be posted at specific times
  • Check all pending comments for spam (if you have plugins like Akismet running)
  • Send emails (i.e. if you have the option enabled where you get emailed whenever a comment is posted, this script handles the email)

Basically wp-cron.php is the automatic part of WordPress.

WP-Cron.php is a very common cause of high CPU loads. Disabling WP-Cron can drastically reduce CPU-load and prevent the chances your account is suspended due to exceeding your resources.

You can disable WP-Cron by editing your wp-config.php and adding the following line;

define('DISABLE_WP_CRON', 'true');

Create a cron job and run wp-cron.php every hour or two using the following command:

wget -O /dev/null http://www.example.com/wp-cron.php?doing_wp_cron

OR (if wget is disabled) :

cd /home/cpanel_user/public_html; php -q wp-cron.php

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