From owner-freebsd-hackers  Sun Oct 28 16: 9:34 2001
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Date: Sun, 28 Oct 2001 18:09:27 -0600 (CST)
From: Mike Silbersack <silby@silby.com>
To: David Kirchner <davidk@accretivetg.com>
Cc: <freebsd-hackers@FreeBSD.ORG>
Subject: Re: disabling dynamic route addition
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On Sun, 28 Oct 2001, David Kirchner wrote:

> Hi,
>
> Is there currently a way (sysctl, patch?) to disable dynamic route
> addition? We have a few very busy web servers here, and we're running in
> to a bug in FreeBSD 4.2 (which is related to a bug in previous versions of
> FreeBSD - the one that's fixed by lowering net.inet.ip.rtexpire to 10 from
> 3600) where the dynamic route table grows but never flushes completely.
> Here it is just as it hit the buffer space limit, according to vmstat -m:
>
> Memory statistics by type                          Type  Kern
>         Type  InUse MemUse HighUse  Limit Requests Limit Limit Size(s)
>      routetbl608495 85570K  85570K 85570K 51402924    0     0
> 16,32,64,128,256
>
> The sister server (round robin) is pretty high as well:
>
>      routetbl280443 39437K  39443K 85570K 37217727    0     0
> 16,32,64,128,256
>
> Also, if this happens again, what additional information could I grab so I
> or others could (hopefully) successfully find the bug?

Many dynamic route related changes have been made since 4.2, your bug may
already be fixed.  You should invest time in transitioning to 4.4.

Mike "Silby" Silbersack


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