When is a computer idle? A friend of mine asked me that question the other day after playing around with the Windows Task Scheduler for a while. One of the conditions in the Task Scheduler is the on idle condition which executes the given task if the computer has been idle for a given amount of time.
But what exactly does it mean, idle? I had troubles answering that question. I knew that it had to do with the resource utilization and user interaction, but was not able to provide exact figures.
That sparked my interest and I managed to get the data. Here is the definition of idle in the Windows operating system:
The computer is considered to be idle by Windows if there has not been user interaction via the mouse or keyboard for a given time and if the hard drives and processors have been idle more than 90% of that time.
The Task Scheduler in Windows 7 for instance considers the computer to be idle if the above states returned true for a period of ten minutes.
There are a few exceptions to that rule. Applications may set a flag that prevents the computer from idle mode. Another possibility are low priority processes that may be ignored by the Windows 7 Task Scheduler. But that appears to be a Windows 7 only rule.
To paraphrase; The computer enters idle mode if
Additional information about Task Idle conditions are available at a Microsoft MSDN Library page.
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Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.