[Users] vzmemcheck

[Peter Senna Tschudin]

Hi,

I only have access to testing environments right now but these are commands
I use:

Guaranteed allocable memory: 2048MB
Debian:/ # vzctl set 35 --vmguarpages 2048M:unlimited --save

Not Guaranteed total allocable memory: 3072MB (barrier)
Safety gap over not guaranteed allocable memory = 3072 * 125% = 3840M (
limit)
Debian:/ # vzctl set 35 --privvmpages 3072M:3840M --save

Out of memory guarantee. No processes will be killed if the VE consumes less
than: 3840M
Debian:/ # vzctl set 35 --oomguarpages 3840M:unlimited --save

Kernel Space memory: barrier 50M limit 55M.
Debian:/ # vzctl set 35 --kmemsize 50M:55M --save

Note that this is not an efficient way of consuming RAM. It may be necessary
to adjust the gap between barrier and limit of privvmpages.

Peter


On Fri, Dec 10, 2010 at 6:18 AM, Steffan <general at ziggo.nl> wrote:

> Thanks Peter,
>
>
>
> Is it possible to get a example config from you, just to see what you have
> setup ?
>
>
>
> Steffan
>
>
>
> *Van:* users-bounces at openvz.org [mailto:users-bounces at openvz.org] *Namens
> *Peter Senna Tschudin
> *Verzonden:* donderdag 9 december 2010 20:39
> *Aan:* users at openvz.org
> *Onderwerp:* Re: [Users] vzmemcheck
>
>
>
> Hey Steffan,
>
>
>
> OpenVZ allows you to control separately both allocated and consumed memory.
> Not all allocated memory will be used.
>
>
>
> So OpenVZ will allow you to allocate more memory than you host has: RAM +
> SWAP but the user land apps of your VEs will not be able to use it.
>
>
>
> On my setups...
>
>
>
> I set vmguarpages barrier to minimum amount of RAM that I want that the VE
> is able to allocate. OpenVZ guarantees this.
>
>
>
> I set privvmpages barrier to the maximum amount of RAM that I want that the
> VE is able to allocate. I set privvmpages limit to a value higher than
> barrier, like 5%~25% more. OpenVZ does not guarantees that the
> extra amount of RAM will be allocable.
>
>
>
> Then I set oomguarpages to same value of privvmpages limit. This isn't the
> best scenario for RAM utilization but ensures low incidence of processes
> being killed by kernel due out of memory condition.
>
>
>
> Hope that it helps,
>
>
>
> Peter
>
>
>
> On Thu, Dec 9, 2010 at 11:35 AM, Steffan <general at ziggo.nl> wrote:
>
> Hello All,
> New to the list, loving openvz
> But having trouble finding out the right settings for the containers
>
> Can someone tell me if im in trouble or everything looks fine
>
> vzcpucheck -v
> VEID            CPUUNITS
> -------------------------
> 0               1000
> 1               10000
> 7               10000
> 8               10000
> 13              10000
> 15              10000
> 23              10000
> 3               10000
> 5               10000
> 2               10000
> 9               10000
> Current CPU utilization: 101000
> Power of the node: 1809010
>
> vzmemcheck -v
> Output values in %
> veid        LowMem  LowMem     RAM MemSwap MemSwap   Alloc   Alloc   Alloc
>               util  commit    util    util  commit    util  commit   limit
> 9             1.44   45.79    1.13    0.97   10.77    2.16    3.42   20.15
> 5             3.14   45.79    3.06    2.62   10.77    5.30   10.77   20.15
> 3             3.96   45.79    3.08    2.64   10.77    5.06   10.77   20.15
> 23            2.04   45.79    2.31    1.98   10.77    3.60   10.77   20.15
> 15            2.69   45.79    3.45    2.95   10.77    5.25   10.77   20.15
> 13            2.68   45.79    2.18    1.87   10.77    4.47   10.77   20.15
> 8             3.33   45.79    4.21    3.60   10.77    5.91   10.77   20.15
> 7             2.29   45.79    1.90    1.62   10.77    3.55   10.77   20.15
> 2             2.41   45.79    3.39    2.90   10.77    4.72   10.99   20.15
> 1             1.98   45.79    1.64    1.40   10.77    2.78   10.77   20.15
> -------------------------------------------------------------------------
> Summary:     25.96  457.95   26.34   22.55  107.69   42.80  100.57  201.49
>
>
> The hw node hs 24 Gb memory, expendable to 96G
> 2 E5520 @ 2.27GHz quadcore processes
>
> How do i read this:
> 25.96 % in use
> But overclocked for 457.95 % ?
>
>
> With regards
>
> Steffan
>
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>
>
>
>
> --
> Peter Senna Tschudin
> peter.senna at gmail.com
> gpg id: 48274C36
>
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>
>


-- 
Peter Senna Tschudin
peter.senna at gmail.com
gpg id: 48274C36
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