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The URL http://translate5.example.org/editor/cron/periodical should be called each 15 Minutes. Currently this triggers only some garbage collection in translate5 and the deadline reminders. If this cronjob is not configured, the clean up is triggered by each request to translate5 once in each 15 minutes. Same for deadline reminders (which means, that without a cron periodical defined in instances with low traffic it will happen, that deadline reminders are not send at all). For performance and reliability reasons the invocation via cron job should be preferred on production systems. If the periodical cron URL was called once, translate5 reconfigures itself to use always the garbage clean up via cron, the request based trigger is automatically deactivated.
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