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Date: Fri, 13 May 2005 23:54:29 +0400 (MSD)
From: Maxim Konovalov <maxim@macomnet.ru>
To: Matt Ruzicka <matt@frii.com>
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cc: freebsd-net@freebsd.org
Subject: Re: **net** Re: Outbound TCP issue, potentially related
 to'FreeBSD-SA-05:08.kmem  [REVISED]'
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[...]
> When I check the vmstat while getting errors from the netcat script I get
> this.
>
> -->vmstat -z | grep -i sock                           2005/05/13 13:33:20
> socket:          224,    16424,  16438,      0,  1150867

Limit ---------------------^^^^^
Current ---------------------------^^^^^

> Here is my vmstat -z in a "normal" state.
>
> ITEM            SIZE     LIMIT    USED    FREE  REQUESTS
[...]
> socket:          224,    16424,   3621,  12817,  1167053

[...]
> And during the failures..
>
> ITEM            SIZE     LIMIT    USED    FREE  REQUESTS
[...]
> socket:          224,    16424,  16430,      8,  1201620

[...]
> Am I pretty much just looking at a tuning issue at this point I assume?

1) Use a persistent connection if possible.

2)

/etc/sysctl.conf:
	net.inet.tcp.msl="5000"
	net.inet.ip.portrange.last="50000"

perhaps

/boot/loader.conf:
	kern.ipc.maxsockets="32768"

-- 
Maxim Konovalov