Date: Fri, 30 Nov 2001 17:14:18 -0500 From: Leo Bicknell <bicknell@ufp.org> To: Alfred Perlstein <bright@mu.org> Cc: Luigi Rizzo <rizzo@aciri.org>, freebsd-hackers@FreeBSD.ORG Subject: Re: TCP Performance Graphs Message-ID: <20011130171418.B96592@ussenterprise.ufp.org> In-Reply-To: <20011130135042.G46769@elvis.mu.org>; from bright@mu.org on Fri, Nov 30, 2001 at 01:50:42PM -0600 References: <20011130102928.E30981@iguana.aciri.org> <20011130141100.B90969@ussenterprise.ufp.org> <20011130112215.H30981@iguana.aciri.org> <20011130135042.G46769@elvis.mu.org> <20011130135402.H46769@elvis.mu.org> <20011130125839.A88302@ussenterprise.ufp.org> <20011130102928.E30981@iguana.aciri.org> <20011130141100.B90969@ussenterprise.ufp.org> <20011130112215.H30981@iguana.aciri.org> <20011130135042.G46769@elvis.mu.org>
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First off, apologies to Luigi, I was shooting off my mouth.
Second off:
On Fri, Nov 30, 2001 at 01:50:42PM -0600, Alfred Perlstein wrote:
> I was about to set the default in -stable to Leo's suggested values,
> it seems that -current already has the delta he wants in it,
> my question is, was anything else changed along the lines of the
> number of nmbclusters allocated in -current to go along with
> this change?
On Fri, Nov 30, 2001 at 01:54:02PM -0600, Alfred Perlstein wrote:
> It seems not, I've committed the change.
When I proposed this before there was a bit of a debate about
needing to increase clusters and MBUF's. To summarize, I think
we took the following away from it:
* For most users it makes no difference, as they are far from the
limits.
* This will make a small number of people who aren't hitting
limits now hit an MBUF limit.
- These people probably need increases anyway, as they are
too close to the limit now.
- Hitting the MBUF limit is fairly, well, harsh, and we might
want to add syslog or other logged warnings at like 90%
utilization or something.
At a minimum I think:
* There needs to be a note in the errata for the release this
goes in mentioning more MBUF's might be needed.
* LINT should be updated with a comment and a value 2 to 4 times
GENERIC's default as the default listed value.
* The logging at 90% usage should be investigated. I can probably
generate patches for that over the weekend, provided I can find
a good way to rate limit them.
--
Leo Bicknell - bicknell@ufp.org - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/
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