Hi, I have been monitoring this problem for a few days and I believe that this increase in cpu and disk usage that occurs every 1 minute is related to PHP7 running the magento crontab.
Is this consumption normal or should I worry?
I looked for something strange in the logs in <magento dir>/var/log and found nothing
Follow how crontab is configured
#~ MAGENTO START
* * * * * /usr/bin/php7.0 /var/www/html/magento2/bin/magento cron:run 2>&1 | grep -v "Ran jobs by schedule" >> /var/www/html/magento2/var/log/magento.cron.log
* * * * * /usr/bin/php7.0 /var/www/html/magento2/update/cron.php >> /var/www/html/magento2/var/log/update.cron.log
* * * * * /usr/bin/php7.0 /var/www/html/magento2/bin/magento setup:cron:run >> /var/www/html/magento2/var/log/setup.cron.log
#~ MAGENTO END
Hello,
It was when caching was disabled so my first call would be to make sure all caches are enabled.
Make sure you're running in production mode (if it's a production server) as when in developer mode a lot of code is generated on the fly.
Also you can check memory_limit in php.ini. If still you will not fix let me knwo.
Please Kudos and mark as solution if it will work. Cheers coding 
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