Re: CPU overhead when handling large files?

[Chris Wedgwood <cw@f00f.org>]

On Sun, Jan 19, 2003 at 02:16:34AM +0900, Seung-yeong Oh wrote:

> For current seup, I'm wondering if the following behavior is normal;
> When handling large files, for example, copying a few 700MB files from
> one directory to another, at some point in the middle of the process or
> at the end of it, the process hangs for several minutes taking up 99% of
> CPU.

It could be the nasty 2.4.x VM... or maybe not.  How full is your disk
when doing this?  How fragmented (xfs_bmap) are the files when you are
done?

> A friend of mine told me it might take some time to rewrite inodes
> as it's a journaling file system, but I don't remember the XFS acted
> this way before when I was using 1.0.2 of it. And 1.1 for that
> matter...  I'd appreciate any input. Thank you.  Have a nice
> weekend.

Writing/updating the inodes shouldn't be barely noticeable.


 --cw