I'm installing a bunch of Magento shops on a webserver. Every website has a cron job that Magento uses to update its stuff -- it takes 3-4 seconds to complete. The instructions tell to set it to run every 5 minutes.
I was asking to myself if is it advisable, for performance reasons, to set every cron to run at different minutes (e.g.: minute 0, 5, 10, etc for the first website -- minute 1, 6, 11, etc for the second and so on), to reduce overlapping, or if this is useless because linux executes multiple cron jobs at the same minute in order, avoiding concurrency.