OpenVZ Forum


Home » Mailing lists » Users » High Swap Load
High Swap Load [message #43245] Fri, 12 August 2011 07:56 Go to next message
Sebastian Bachmann is currently offline  Sebastian Bachmann
Messages: 3
Registered: July 2011
Junior Member
From: *parallels.com
We have a really weird problem with one of our OpenVZ Hosts. Sometimes the
swap is filled with arround of 2GB of Data, this causes that high load that
the server is not available... The really weird thing is that the memory is
not completly used! we have 8GB of RAM installed but only 3,5GB are really
used (1,7G buffered and 2G cached) - that means there are still arround
0,6GB of free mem and the cached mem can also be used, so why the server
should swap???

My theroy is that a single VZ doesnt have set enouth RAM to use and if its
full the complete VZ is swapped, this could be possible because we have 2
VZs which are allowed to use 2GB of Memory. The other theory is that both
VZs (or some more) need some memory at the same time and then we dont have
enough RAM free...

We set in /etc/sysctl.conf vm.swappiness=1 but still no change...

May someone had the same issue and can help us.

thanks and greetings!

sebastian
RE: High Swap Load [message #43246 is a reply to message #43245] Fri, 12 August 2011 08:28 Go to previous messageGo to next message
CM [Sprintserve.net] is currently offline  CM [Sprintserve.net]
Messages: 2
Registered: August 2011
Junior Member
From: *parallels.com
-----Original Message-----
From: users-bounces@openvz.org [mailto:users-bounces@openvz.org] On Behalf Of Sebastian Bachmann
Sent: Friday, 12 August, 2011 3:57 PM
To: Users@openvz.org
Subject: [Users] High Swap Load

We have a really weird problem with one of our OpenVZ Hosts. Sometimes the swap is filled with arround of 2GB of Data, this causes that high load that the server is not available... The really weird thing is that the memory is not completly used! we have 8GB of RAM installed but only 3,5GB are really used (1,7G buffered and 2G cached) - that means there are still arround 0,6GB of free mem and the cached mem can also be used, so why the server should swap???


Are you running 32bit OS? If yes, what kernel are you using? Make sure you are using one with PAE enabled.


regards
CM
Re: High Swap Load [message #43247 is a reply to message #43245] Fri, 12 August 2011 08:30 Go to previous messageGo to next message
Einar S. Ids is currently offline  Einar S. Ids
Messages: 6
Registered: August 2011
Junior Member
From: *parallels.com
On Fri, Aug 12, 2011 at 9:56 AM, Sebastian Bachmann <me@free-minds.net> wrote:
> the server is not available... The really weird thing is that the memory is
> not completly used! we have 8GB of RAM installed but only 3,5GB are really
> used (1,7G buffered and 2G cached) - that means there are still arround
> 0,6GB of free mem and the cached mem can also be used, so why the server
> should swap???

Hi Sebastian,

Is the host 32-bit? If yes, then perhaps this applies to you?
http://wiki.openvz.org/Different_kernel_flavors_%28UP,_SMP,_ ENTERPRISE,_ENTNOSPLIT%29

Cheers,
Einar
RE: High Swap Load [message #43248 is a reply to message #43246] Fri, 12 August 2011 08:34 Go to previous messageGo to next message
Sebastian Bachmann is currently offline  Sebastian Bachmann
Messages: 3
Registered: July 2011
Junior Member
From: *parallels.com
hi,

On Fri, 12 Aug 2011 16:28:06 +0800, "CM [Sprintserve.net]"
<silver@sprintserve.net> wrote:
> -----Original Message-----
> From: users-bounces@openvz.org [mailto:users-bounces@openvz.org] On
Behalf
> Of Sebastian Bachmann
> Sent: Friday, 12 August, 2011 3:57 PM
> To: Users@openvz.org
> Subject: [Users] High Swap Load
>
> We have a really weird problem with one of our OpenVZ Hosts. Sometimes
the
> swap is filled with arround of 2GB of Data, this causes that high load
that
> the server is not available... The really weird thing is that the memory
is
> not completly used! we have 8GB of RAM installed but only 3,5GB are
really
> used (1,7G buffered and 2G cached) - that means there are still arround
> 0,6GB of free mem and the cached mem can also be used, so why the server
> should swap???
>
>
> Are you running 32bit OS? If yes, what kernel are you using? Make sure
you
> are using one with PAE enabled.
nope we are running currently under Linux 2.6.32-5-openvz-amd64 #1 SMP Wed
Jan 12 04:22:50 UTC 2011 x86_64 GNU/Linux
RE: High Swap Load [message #46190 is a reply to message #43248] Tue, 01 May 2012 12:23 Go to previous message
Esm is currently offline  Esm
Messages: 15
Registered: August 2011
Junior Member
From: *parallels.com
Hi Sebastian,

I just have the same kind of situation over here. Did you find a solution and would you maybe so kind to share it with us if you did?

Thank you very much!

Kind Regards,

E. de Wolf

-----Oorspronkelijk bericht-----
Van: users-bounces@openvz.org [mailto:users-bounces@openvz.org] Namens Sebastian Bachmann
Verzonden: vrijdag 12 augustus 2011 10:35
Aan: silver@sprintserve.net; users@openvz.org
Onderwerp: RE: [Users] High Swap Load

hi,

On Fri, 12 Aug 2011 16:28:06 +0800, "CM [Sprintserve.net]"
<silver@sprintserve.net> wrote:
> -----Original Message-----
> From: users-bounces@openvz.org [mailto:users-bounces@openvz.org] On
Behalf
> Of Sebastian Bachmann
> Sent: Friday, 12 August, 2011 3:57 PM
> To: Users@openvz.org
> Subject: [Users] High Swap Load
>
> We have a really weird problem with one of our OpenVZ Hosts. Sometimes
the
> swap is filled with arround of 2GB of Data, this causes that high load
that
> the server is not available... The really weird thing is that the
> memory
is
> not completly used! we have 8GB of RAM installed but only 3,5GB are
really
> used (1,7G buffered and 2G cached) - that means there are still
> arround 0,6GB of free mem and the cached mem can also be used, so why
> the server should swap???
>
>
> Are you running 32bit OS? If yes, what kernel are you using? Make sure
you
> are using one with PAE enabled.
nope we are running currently under Linux 2.6.32-5-openvz-amd64 #1 SMP Wed Jan 12 04:22:50 UTC 2011 x86_64 GNU/Linux
Previous Topic: rpc.idmapd in container
Next Topic: Install from USB: isolinux.bin is missing
Goto Forum:
  


Current Time: Tue Nov 20 23:51:21 GMT 2018