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From: Matthias Buelow <mkb@incubus.de>
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In-Reply-To: Message from Lowell Gilbert
	<freebsd-questions-local@be-well.ilk.org> 
	of "06 Jul 2005 14:26:22 EDT." <44u0j7iyep.fsf@be-well.ilk.org> 
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Date: Wed, 06 Jul 2005 21:00:43 +0200
Sender: mkb@mkbuelow.net
Cc: "Scott I. Remick" <scott@sremick.net>
Subject: Re: Weird "nice" behavior 
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Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> writes:

>> FreeBSD 5.4-RELEASE
>> 
>> I'm trying to do a large local rsync in the background, while listening to
>> streaming audio via RealPlayer and do other stuff. I have the rsync
>> running at nice level 20 ("nice -20") which I've confirmed via ps:

Please try: http://www.chesapeake.net/~jroberson/flushbuf.diff
before this discussion degenerates into the usual handwaving.

The patch seems to fix some awful performance issue with certain disk
i/o loads in 5.4. I don't know whether it's included in 5.4-stable by
now.

mkb.