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Hi i have a website in magento2 , in my database we have 467500 rows in cron_schedule table , my site is lacking alot and most of the time it goes down displaying server timeout issue . The configuration of my server is 18gb ram with 1 tb HDD , my database got crashed during the time of when cron jobs run , its my guess it is creating issue .

i see 462318 statuses are in pending states in my cron_schedule table out of 467500 statuses .

I just wants to know is this creating issue ? should i delete that all rows in my table for quick heal ? , as my db is crashing so much , what will be the permanent solution for this ?

  • Additional information request, please. Post on pastebin.com or here. A) complete (not edited) my.cnf or my.ini Text results of: B) SHOW GLOBAL STATUS; after minimum 24 hours UPTIME C) SHOW GLOBAL VARIABLES; D) complete MySQLTuner report if readily available AND Optional very helpful information, if available includes - htop OR top OR mytop for most active apps, ulimit -a for a linux/unix list of limits, iostat -x when system is busy for an idea of IOPS by device, df -h for a linux/unix free space list by device FOR server tuning analysis. – Wilson Hauck Oct 12 '18 at 16:10
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Magento had an issue where if one of your cron jobs takes longer than a minute to complete, it will keep starting new processes with the same tasks because it only writes the completed task to the database after all cronjobs have finished, causing a large amount of duplicate cronjobs with the status pending.

You could delete all cron jobs that are more than a day old with DELETE FROM cron_schedule WHERE created_at < DATE_SUB(NOW(), INTERVAL 1 DAY). The fix for this issue is in Magento 2.2.5, so you should upgrade if you haven't yet. If you can't upgrade yet you could run the query above in a daily cronjob as a temporary fix.

  • it works , useless crons deleted but the problem is still pressent i think its in my version issue 2.2 – Hamza Mustafa Oct 8 '18 at 12:25
  • @HamzaMustafa Any chance we could Skype TALK? Please view my profile, Network profile for contact information including my Skype ID. – Wilson Hauck Oct 31 '18 at 14:22

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