[Users] vzmemcheck

[Peter Senna Tschudin]

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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> Users at openvz.org
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>



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