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WordPress External Cron

For low traffic WordPress sites, the internal cron will not run on a reliable schedule resulting in missed jobs. For high traffic sites the internal cron can result in excessive cron runs. The solution is to disable the internal cron and setup an external cronjob at the operating system level.

To disable the internal cron add the following to wp-config.php:

For the external cron you can use curl or wget, but my preference is wp-cli like this:

On a Plesk server this might look like: