Magento Settings: System >> Configuration >> System > ‘Cron (Scheduled Tasks)’ tab.
- Generate schedules every: 60
- Schedule ahead for: 1
- Missed if not run within: 60
- History cleanup every: 120
- Success history lifetime: 120
- Failure history lifetime: 120
$ crontab -e
# Execute the Magneto cron every 15 minutes */15 * * * * /bin/sh /path/to/magento/cron.shThese settings allow Magento to generate and clean schedules within a 2-hour time frame.