yahoo-eng-team team mailing list archive

[sean mooney <smooney@xxxxxxxxxx>]

this is not a but at least not as reported.

free_ram_mb is not ment to be equal to the  free value of "free -m"

memory_mb is 4047 and memory_mb 4096

as a result the total amount of memery that you have acounted against
guests  is 49 mb more then the avalible  ram

so free_ram_mb which is caluated as  memory_mb  -  memory_mb_used 
is  -49 as you are oversubsibed by 49MBs

the default ram allocation ratio is 1.5 which is why you are allowed to allocate more ram then you have up to 6GiB in your
case.

not that memory_mb_used is calulated by suming the total ram of all vms
scheduled to a node + the reserved_host_memory_mb config value which i
would guess defaults to 4096 in triplo.


https://docs.openstack.org/nova/latest/configuration/config.html#DEFAULT.reserved_host_memory_mb



** Changed in: nova
       Status: Confirmed => Invalid

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1767315

Title:
  "openstack hypervisor stats show" shows wrong memory information

Status in OpenStack Compute (nova):
  Invalid

Bug description:
  Description
  ===========
  "openstack hypervisor stats show" shows wrong memory information
  Steps to reproduce
  ==================
  - The deployment is done through tripleo-quickstart for openstack queens

  (overcloud) [stack@undercloud ~]$ openstack hypervisor stats show
  +----------------------+-------+
  | Field                | Value |
  +----------------------+-------+
  | count                | 1     |
  | current_workload     | 0     |
  | disk_available_least | 43    |
  | free_disk_gb         | 49    |
  | free_ram_mb          | -49   |
  | local_gb             | 49    |
  | local_gb_used        | 0     |
  | memory_mb            | 4047  |
  | memory_mb_used       | 4096  |
  | running_vms          | 0     |
  | vcpus                | 2     |
  | vcpus_used           | 0     |
  +----------------------+-------+
  (overcloud) [stack@undercloud ~]$ 

  [root@overcloud-novacompute-0 ~]# free -m
                total        used        free      shared  buff/cache   available
  Mem:           3742         556         203           1        2982        2688
  Swap:             0           0           0
  [root@overcloud-novacompute-0 ~]# 

  
  Expected result
  ===============
  Should leverage the actual available memory.

  Actual result
  =============
  Showing wrong memory value.

  
  Environment
  ===========
  - Openstack queens

  [heat-admin@overcloud-novacompute-0 ~]$ rpm -qa | grep nova
  openstack-nova-placement-api-17.0.3-0.20180420001136.bf0a069.el7.centos.noarch
  python-nova-17.0.3-0.20180420001136.bf0a069.el7.centos.noarch
  puppet-nova-12.4.1-0.20180423041756.95ca7cd.el7.centos.noarch
  openstack-nova-scheduler-17.0.3-0.20180420001136.bf0a069.el7.centos.noarch
  python2-novaclient-9.1.1-0.20180213141814.a1c0074.el7.centos.noarch
  openstack-nova-conductor-17.0.3-0.20180420001136.bf0a069.el7.centos.noarch
  openstack-nova-migration-17.0.3-0.20180420001136.bf0a069.el7.centos.noarch
  openstack-nova-console-17.0.3-0.20180420001136.bf0a069.el7.centos.noarch
  openstack-nova-common-17.0.3-0.20180420001136.bf0a069.el7.centos.noarch
  openstack-nova-compute-17.0.3-0.20180420001136.bf0a069.el7.centos.noarch
  openstack-nova-api-17.0.3-0.20180420001136.bf0a069.el7.centos.noarch
  openstack-nova-novncproxy-17.0.3-0.20180420001136.bf0a069.el7.centos.noarch
  [heat-admin@overcloud-novacompute-0 ~]$ 

  Logs & Configs
  ==============
  - default configuration

To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1767315/+subscriptions