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OpenVZ HN became sluggish [message #51817] Sat, 27 December 2014 21:48 Go to next message
BadAss is currently offline  BadAss
Messages: 3
Registered: December 2014
Junior Member
From: *vpn.ipredator.se
I have a weird problem. My OpenVZ HN became sluggish since yesterday. At the moment there is only one running VPS container which is not using too much resources as far as i can see with Glances.

I run Linux joe 2.6.32-042stab094.8 #1 SMP Tue Dec 16 20:36:56 MSK 2014 x86_64 x86_64 x86_64 GNU/Linux

What are the problems:

- When i TOP the refreshrate hangs and goes further after 10 seconds
- When i connect to sftp, it is terribly slow and when i want to download something, the download fails most of the time.
- Login to OpenVZ HN trough SSH can take 10-15 seconds until password has been asked.

Strange part is that the VPS container is quick. Login trough sftp works like it should.

The server has 2 quad core CPU's and 32GB of ram.

Quote:

top - 23:45:00 up 1:11, 1 user, load average: 0.16, 0.06, 0.08
Tasks: 224 total, 1 running, 223 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.1%us, 0.2%sy, 0.2%ni, 99.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 32805844k total, 8097180k used, 24708664k free, 46608k buffers
Swap: 33554428k total, 0k used, 33554428k free, 3659328k cached


Disk I/O looks ok, no strange values.

Anyone has an idea?
Re: OpenVZ HN became sluggish [message #51818 is a reply to message #51817] Sun, 28 December 2014 15:21 Go to previous messageGo to next message
Paparaciz
Messages: 302
Registered: August 2009
Senior Member
From: *static.zebra.lt
slow ssh init connection usual is because of dns issues. check how responsive is dns server, change openvz settings not to try resolve ip address to hostname or smth.

is HN and CT is in the same network?
traffic shaping?
Re: OpenVZ HN became sluggish [message #51908 is a reply to message #51818] Sat, 07 March 2015 00:16 Go to previous message
spoke2u
Messages: 12
Registered: September 2013
Junior Member
From: *dsl.teksavvy.com
This may not be any help but I checked my Hardware node syslog and had alot of __ratelimit: callbacks suppressed messages and plenty of eth1: received packet with own address as source address

i had the same problem. But it could be different

Check your syslog

[   38.967702] __ratelimit: 104 callbacks suppressed
[   38.967705] eth1: received packet with own address as source address
[   38.968283] eth1: received packet with own address as source address
[   38.969402] eth1: received packet with own address as source address
[   39.028349] eth1: received packet with own address as source address
[   39.029152] eth1: received packet with own address as source address
[   39.030352] eth1: received packet with own address as source address
[   39.067343] eth1: received packet with own address as source address
[   39.067940] eth1: received packet with own address as source address
[   39.108797] eth1: received packet with own address as source address
[   39.176829] eth1: received packet with own address as source address
[   44.025167] __ratelimit: 50 callbacks suppressed
[   44.025169] eth1: received packet with own address as source address
[   44.284032] eth1: received packet with own address as source address
[   44.524232] eth1: received packet with own address as source address
[   44.705052] eth1: received packet with own address as source address
[   44.803056] eth1: received packet with own address as source address
[   44.983080] eth1: received packet with own address as source address
[   45.097899] eth1: received packet with own address as source address
[   45.232783] eth1: received packet with own address as source address
[   45.760855] eth1: received packet with own address as source address
[   45.864921] eth1: received packet with own address as source address


After researching that it was not in fact changing mac address or routing I found someone posted it was the switch and I swapped out to a spare switch and all my weird lag and time outs where fixed.

anything in the logs?


--
I am unable to see

[Updated on: Sat, 07 March 2015 00:17]

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