DOM0 Memory issue


LSB Version:     core-4.1-amd64:core-4.1-noarch
Distributor ID:  XCP-ng
Description:     XCP-ng release 8.0.0 (xenenterprise)
Release:         8.0.0
Codename:        xenenterprise

Linux cpt-dc-xen02 4.19.0+1 #1 SMP Fri Jul 19 17:27:05 CEST 2019 x86_64 x86_64 x86_64 GNU/Linux

VM Details

* All VMS are Ubuntu 18.04
* stress01 - stress06 is running stres-ng (see below for exact commands)
* stress07 and stress08 are running s-tui (stress options 4 worker count, rest default)
* sStress09 and stress10 are doing a network throughput using iperf between each other on a private network
* stress11 to stress15 are not doing any extra, just running

Stress command lines

* stress01
stress-ng --vm 2 --vm-bytes 4G --mmap 4 --mmap-bytes 4G --page-in --hdd 10 --cpu-method all

* stress02
stress-ng --vm 4 --vm-bytes 8G --mmap 8 --mmap-bytes 8G --page-in --hdd 50 --cpu-method all

* stress03
stress-ng --vm 8 --vm-bytes 16G --mmap 16 --mmap-bytes 16G --page-in --hdd 100 --cpu-method all

* stress04
stress-ng --vm 2 --vm-bytes 4G --mmap 4 --mmap-bytes 4G --page-in --hdd 30 --cpu-method all

* stress05
stress-ng --vm 3 --vm-bytes 4G --mmap 10 --mmap-bytes 4G --page-in --hdd 40 --cpu-method all

* stress06
stress-ng --vm 4 --vm-bytes 8G --mmap 8 --mmap-bytes 8G --page-in --hdd 40 --cpu-method all


DOM0 Memory (free -m)

Testing based on XCP-ng 8.0 with standard kernel

   * 26.1.2021 -- 662 MB used -- 6307 MB free (initial)
   * 27.1.2021 -- 726 MB used -- 6270 MB free only running stress01-stress03 and stopped after a few hours
   * 28.1.2021 11:36 AM -- 840 MB used -- 6123  MB free
   * 28.1.2021 12:23 AM -- 866 MB used -- 6191  MB free
   * 28.1.2021 3:59 PM   -- 877 MB used -- 6056  MB free
   * 28.1.2021 4:35 PM   -- 883 MB used -- 6048  MB free
   * 29.1.2021 7:32 AM   -- 897 MB used -- 6004  MB free