CentOS/RHEL: Faster PHP CLI and Cron Jobs
How to consistently set up PHP CLI and cron runs while making benefit from file-based OPcache and no memory limit
crontab
Practical crontab guides from the GetPageSpeed engineering team: configuration, performance tuning and security for production Linux servers.
2 articles
WordPress Cron Optimization
Make that slow Wordpress cron fast again by having it run with real Linux cron service