Date: Tue, 28 Feb 2006 12:01:02 +0100 From: Peter Prucker <service_ist@abwesend.de> To: freebsd-net@freebsd.org Subject: Re: Only one concurrent connection in jail possible (5.4) Message-ID: <200602281201.02610.service_ist@abwesend.de> In-Reply-To: <20060228090523.GI67387@catpipe.net> References: <29981.1141116810@www024.gmx.net> <20060228090523.GI67387@catpipe.net>
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On Tuesday 28 February 2006 10:05, Phil Regnauld wrote:
> service_ist@abwesend.de (service_ist) writes:
> > Hi,
> >
> > I've setup a server with 16 jails using 5.4. Right after bringing it
> > up I wondered about its bad performance.
>
> We need to know many things here:
>
> - CPU, RAM, disk, disk layout, swap
CPU: AMD Sempron 3000+
RAM: real memory = 1007 MB, avail memory = 977 MB
disk: 3ware 7006-2 with two Maxtor 6L160P0 in a raid 1
disk layout:
/dev/twed0s1a 496M 71M 386M 15% /
/dev/twed0s3d 119G 16G 94G 14% /home
/dev/twed0s1g 4.8G 28K 4.5G 0% /tmp
/dev/twed0s1d 4.8G 1.2G 3.3G 27% /usr
/dev/twed0s1f 5.3G 328M 4.6G 7% /usr/ports
/dev/twed0s1e 989M 400M 510M 44% /usr/src
/dev/twed0s2d 3.9G 48M 3.5G 1% /var
/dev/twed0s2e 3.9G 662M 2.9G 18% /var/ccache
/dev/twed0s2f 989M 5.5M 905M 1% /var/log
/dev/twed0s2g 1.9G 16M 1.8G 1% /var/tmp
The jails are in /home.
swap: 2 GB at twed0s1b
> What does disk I/O look like ? (gstat)
Just zeros, with a little flickering some times.
> What does network I/O look like ? (netstat -ain 1)
input (Total) output
packets errs bytes packets errs bytes colls
2 0 128 2 0 296 0
1 0 66 1 0 178 0
1 0 66 1 0 178 0
1 0 66 1 0 178 0
3 0 235 2 0 297 0
2 0 126 2 0 220 0
2 0 164 3 0 374 0
3 0 204 2 0 248 0
5 0 404 3 0 416 0
1 0 66 1 0 178 0
172 0 55221 181 0 51887 0
702 0 189462 696 0 193378 0
858 0 321384 862 0 324292 0
1091 0 193559 1099 0 194596 0
917 0 212652 911 0 213837 0
734 0 240609 717 0 241236 0
6 0 444 5 0 450 0
2 0 126 1 0 178 0
1 0 66 1 0 178 0
1 0 66 1 0 178 0
The part in the middle is when I'm doing a proxy request.
> Interrupts ? (vmstat -i)
interrupt total rate
irq8: rtc 40520502 128
irq13: npx0 1 0
irq17: twe0 11152149 35
irq23: vr0 1217326 3
irq0: clk 31654941 99
Total 84544919 267
> Have you read tuning(7) ? There's a lot of info in there about
> socket tuning, network buffers, etc...
I've increased net.inet.ip.portrange to 15000 and kern.ipc.somaxconn to
512, what did not bring any results.
> Check out what the logs say, eventual warnings on the console, etc...
No errors, no warnings.
Peter
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