disk io

copying a file slows down your linux system?

Submitted by johnny on Tue, 02/03/2009 - 13:37

Posted in

In my case, I was working on a very busy web server and when trying to copy a 500GB file, the sites were slowing down really bad.

There is a handy tool which you can use to lower the priority on disk usage for specified processes called 'ionice'.

There are 3 levels of priority:
1 - real time
2 - best effort
3 - idle

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