On Oct 13, 2009, at 12:35 AM, Luigi Rizzo wrote:
On Mon, Oct 12, 2009 at 09:48:42PM +0200, Thomas Backman wrote:
I'm copying this over from the freebsd-performance list, as I'm
looking for a few more opinions - not on the problems *I* am having,
but rather to check whether the problem is universal or not, and if
not, find a possible common factor.
In other words: I want to hear about your experiences, *good or bad*!
Here's the original thread (not from the beginning, though):
http://lists.freebsd.org/pipermail/freebsd-performance/2009-October/003843.html
Long story short, my version: when the disk is stressed hard enough,
console IO becomes COMPLETELY unbearable. 10+ seconds to switch
between windows in screen(1), running (or even typing) simple
commands, etc. This happens both via SSH and the serial console.
hi,
this issue (not specific to FreeBSD, and not new -- it has been
like this forever) is discussed in some detail here
http://www.bsdcan.org/2009/schedule/events/122.en.html
The following code (a bit outdated) can help
http://lists.freebsd.org/pipermail/freebsd-stable/2009-March/048704.html
cheers
luigi
Hmm, how stable would you say the code is? (And/or has there been any
progress since March?)
I'd prefer something that I feel confident in using in production, and
the warning in the README clearly says "stay away!".
Regards,
Thomas
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