Network slowness [message #14563] |
Mon, 02 July 2007 14:13 |
Kai Hendry
Messages: 4 Registered: July 2007
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Junior Member |
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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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Re: Network slowness [message #14583 is a reply to message #14579] |
Mon, 02 July 2007 19:44 |
Leslie Watter
Messages: 1 Registered: July 2007
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Junior Member |
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Hi Kai,
Try to increase these limits again, until you don't get an increase in
the failcnt column.
When you get a failcnt it is telling you that you don't have the right
amount of resources, and things can (and probably will) go wrong.
Cheers,
LEslie
2007/7/2, Kai Hendry <kai.hendry@gmail.com>:
> I've ramped up these limits, though it is still slow. :/
>
> python db-test.py 0.46s user 0.01s system 1% cpu 28.852 total
> python db-test.py 0.46s user 0.01s system 1% cpu 28.791 total
>
--
Leslie H. Watter
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