How to identify heavy write to disk?

Posted by Darth on Server Fault See other posts from Server Fault or by Darth
Published on 2009-11-29T09:43:09Z Indexed on 2010/05/20 23:50 UTC
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I have this problem with server running CakePHP application. The server is insanely slow, I first thought that it's application problem, but then I found constant 5-6MB/s write to disk.

What is the easiest way to find cause of such a heavy write?

The server is running Gentoo.

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