Messages in this thread | | | Subject | Re: PROBLEM: Heavy iowait on 2.6 kernels | From | Guy Van Sanden <> | Date | Wed, 16 Jun 2004 09:25:31 +0200 |
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My machine is heavily used for all kinds of file serving (mainly nfs), but also samba. Next to that, it is my home-server, so it runs apache2 (tuned to server only few clients), imap (cyrus), postfix, bugzilla (mysql) and distcc (used only a few times a week). It replaces a FreeBSD system (PII-333) running the same except distcc. Under
The disk system is just a regular IDE disk (udma5) (60GB) and one external drive over USB2 (160 GB). The external drive is rather slow (20-30 MB/sec), so I disabled it during the tests.
The weird thing is that I see this problem too when only running bonnie. A friend of mine tried that too under 2.6.6, his iowait went up to 0.15%, mine to 99%.
On Wed, 2004-06-16 at 08:15, Clint Byrum wrote: > On Fri, 2004-06-11 at 01:35, Guy Van Sanden wrote: > > I recently discovered why my new Gentoo server slows to a crawl on a > > intermediate load on the 2.6 kernel series. The reason seems to be an > > unusual amount of iowait. > > This appears similar to the problem both myself and Phy Prahbab reported > about 2.6 and hitting the disks too often. > > I'm wondering, what kind of workload does your machine see, and what > sort of disk system is in it? > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- ______________________________________________________________________
Guy Van Sanden http://unixmafia.port5.com
Registered Linux user #249404 - September 1997 ______________________________________________________________________
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