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Re: Network slowness [message #14567 is a reply to message #14563]

Mon, 02 July 2007 14:27

dev
Messages: 1693
Registered: September 2005
Location: Moscow

Senior Member

Check /proc/user_beancounters limits (post it here).
It can be due to a limit network buffers allowed.

Thanks,
Kirill

Kai Hendry wrote:
> Hi, I am using a kernel from deb http://download.openvz.org/debian etch main
>
> Linux argo 2.6.18-028stab033.1-ovz-smp #1 SMP Thu May 31 04:17:27 CEST
> 2007 i686 GNU/Linux
>
> argo$ sudo vzctl --version
> vzctl version 3.0.11
>
>
> I've setup an openvz VE (running Debian Unstable) like so:
> http://faq.dabase.com/faqw.py?req=show&file=faq01.152.ht p
>
> And I am quite happy with it. Except I have experiencing some odd
> slow network behaviour, which I am having trouble debugging.
>
> I first noticed it when my apt-get upgrades hung (timed out).
>
> Now I've been noticing for an application in the VE to connect to a
> remote mysql DB.
>
> monty is my laptop in the UK
> simon is the VE
> argo is the host
>
> http://pastebin.com/940574
>
> You can see that simon seems to take consistently almost 30 secs to
> get a couple of records from the DB. Any ideas why?
>
> I have tried stopping and starting simon. I suspected DNS troubles at
> first, though simon to be able to look up stuff as fast as argo.
>
> Kind regards,
>
>
> ------------------------------------------------------------ ------------
>
> simon:~% sudo /sbin/ifconfig
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
>
> venet0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
> inet addr:127.0.0.1 P-t-P:127.0.0.1 Bcast:0.0.0.0 Mask:255.255.255.255
> UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
> RX packets:1858952 errors:0 dropped:0 overruns:0 frame:0
> TX packets:1771614 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:851745664 (812.2 MiB) TX bytes:258658607 (246.6 MiB)
>
> venet0:0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
> inet addr:192.168.2.66 P-t-P:192.168.2.66 Bcast:0.0.0.0 Mask:255.255.255.255
> UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
>
> simon:~% sudo route
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use Iface
> 191.255.255.1 * 255.255.255.255 UH 0 0 0 venet0
> default 191.255.255.1 0.0.0.0 UG 0 0 0 venet0
> simon:~% sudo cat /etc/resolv.conf
> search nipl.net
> nameserver 72.29.96.250
>
>
> ------------------------------------------------------------ ------------
>

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[Message index]

		Network slowness By: Kai Hendry on Mon, 02 July 2007 14:13
		Re: Network slowness By: dev on Mon, 02 July 2007 14:27
		Re: Network slowness By: Kai Hendry on Mon, 02 July 2007 14:32
		Re: Network slowness By: dev on Mon, 02 July 2007 15:00
		Re: Network slowness By: Kai Hendry on Mon, 02 July 2007 17:49
		Re: Network slowness By: Leslie Watter on Mon, 02 July 2007 19:44
		Re: Network slowness By: Kai Hendry on Mon, 02 July 2007 16:01

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