In case your Magento 2 app is closed/shutdown/explode when there is running cronjob it will stay in "running" status forever.
This might be the reason why your Magento 2 will create more and more jobs in cron_schedule table and that will result that your Magento 2 will use 100% of CPU after few weeks.
This extension fix this issue by marking "running" cronjobs as error if they are older than 3 hours.
More informations you will find on our blog: https://alekseon.com/en/blog/post/magento-2-slow-and-cpu-usage-gets-high-this-might-be-the-reason/
- From your CLI run:
composer require alekseon/module-cleanrunningjobs - Flush your cache.
- Upgrade database:
bin/magento setup:upgrade