[Starlingx-discuss] Limit memory usage on Virtual Environment

[Lemus Contreras, Cristopher J]

Using CENGN image from May/15, we observed that memory usage on virtual environment is no longer topped. i.e., a standard (2+2) configuration with a full setup:

Controller-0 (Active)
              total        used        free      shared  buff/cache   available
Mem:            23G        4.6G         11G         48M        7.5G         17G
Swap:            0B          0B          0B
 
 
Controller-1 (standby)
              total        used        free      shared  buff/cache   available
Mem:            23G        1.6G         18G         10M        3.4G         21G
Swap:            0B          0B          0B
 
 
Compute-0
              total        used        free      shared  buff/cache   available
Mem:            31G        601M         28G        9.3M        2.0G         30G
Swap:            0B          0B          0B
 
 
Compute-1
              total        used        free      shared  buff/cache   available
Mem:            31G        554M         28G         16M        2.0G         30G
Swap:            0B          0B          0B


Even when we assigned 24GB/32GB to the VMs, the usage is considerably low. 

Thanks for the assistance on this.

Regards,

Cristopher Lemus

On 5/14/19, 4:39 PM, "Victor Rodriguez" <vm.rod25 at gmail.com> wrote:

    Thanks a lot Brent
    
    This is really helpful, we will test and came back with feedback.
    
    Thanks a lot
    
    Victor R
    
    On Tue, May 14, 2019 at 3:01 PM Rowsell, Brent
    <Brent.Rowsell at windriver.com> wrote:
    >
    > You can modify the memory allocations per function on the host using the command below. The node must be locked. After updating, unlock the node.
    >
    >
    >
    > system help host-memory-modify
    >
    > usage: system host-memory-modify [-m <Platform Reserved MiB>]
    >
    >                                  [-2M <2M hugepages number>]
    >
    >                                  [-1G <1G hugepages number>] [-f <function>]
    >
    >                                  <hostname or id> <processor>
    >
    >
    >
    > Modify platform reserved and/or application huge page memory attributes for
    >
    > worker nodes.
    >
    >
    >
    > Positional arguments:
    >
    >   <hostname or id>      Name or ID of host
    >
    >   <processor>           processor
    >
    >
    >
    > Optional arguments:
    >
    >   -m <Platform Reserved MiB>, --platform_reserved_mib <Platform Reserved MiB>
    >
    >                         The amount of platform memory (MiB) for the numa node
    >
    >   -2M <2M hugepages number>, --hugepages_nr_2M_pending <2M hugepages number>
    >
    >                         The number of 2M vm huge pages for the numa node
    >
    >   -1G <1G hugepages number>, --hugepages_nr_1G_pending <1G hugepages number>
    >
    >                         The number of 1G vm huge pages for the numa node
    >
    >   -f <function>, --function <function>
    >
    >                         The Memory Function.
    >
    >
    >
    > Brent
    >
    >
    >
    > From: Lemus Contreras, Cristopher J [mailto:cristopher.j.lemus.contreras at intel.com]
    > Sent: Wednesday, May 8, 2019 11:30 AM
    > To: starlingx-discuss at lists.starlingx.io
    > Cc: Rowsell, Brent <Brent.Rowsell at windriver.com>
    > Subject: Limit memory usage on Virtual Environment
    >
    >
    >
    > Hello,
    >
    >
    >
    > During today’s Community meeting, memory usage on virtual environments was discussed. In summary, the memory requirements for each VM has increased significantly (see bug: https://bugs.launchpad.net/bugs/1826445 ).
    >
    >
    >
    > An alternative was mentioned, during the deployment it’s possible to limit the amount of memory that starlingx is going to use. Does somebody has the instructions to implement such limits? It’ll help us a lot to continue working with Virtual Environments.
    >
    >
    >
    > Thanks in advance.
    >
    >
    >
    > Cristopher Lemus
    >
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