Thanks for the prompt feedback.

This [*] is the output of "openstack hypervisor show cld-blu-01.cloud.pd.infn.it"

Let me also add that if I restart openstack-nova-compute on the hypervisor, then "nova host-describe" shows the right information for a few seconds:

[root@cld-ctrl-01 ~]# nova host-describe cld-blu-01.cloud.pd.infn.it

+-----------------------------+----------------------------------+-----+-----------+---------+

+-----------------------------+----------------------------------+-----+-----------+---------+

| cld-blu-01.cloud.pd.infn.it | (total) | 8 | 32722 | 241 |

| cld-blu-01.cloud.pd.infn.it | (used_now) | 19 | 39424 | 95 |

| cld-blu-01.cloud.pd.infn.it | (used_max) | 19 | 38912 | 95 |

| cld-blu-01.cloud.pd.infn.it | b08eede75d5e4be4b0fe21e68fa9c688 | 1 | 2048 | 20 |

| cld-blu-01.cloud.pd.infn.it | 7890b3e262264529a19f9743cf2f14bc | 16 | 32768 | 50 |

| cld-blu-01.cloud.pd.infn.it | 4d8187cffa6a4085ad4a357b8a5afc03 | 2 | 4096 | 25 |

+-----------------------------+----------------------------------+-----+-----------+---------+

but after a while it goes back publishing 16256 MB as used_now

Thanks, Massimo

[*]

# openstack hypervisor show cld-blu-01.cloud.pd.infn.it

+----------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

| Field | Value |

+----------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

| aggregates | [u'Unipd-AdminTesting-Unipd', u'Unipd-HPC-Physics', u'Unipd-model-glasses---DISC', u'Unipd-DECAMP', u'Unipd-Biodiversity-Macro-biomes', u'Unipd- |

| | CMB4PrimordialNonGaussianity', u'Unipd-Links-in-Channel', u'Unipd-TC4SAP', u'Unipd-Diabetes_Risk', u'Unipd-LabTrasporti', u'Unipd-Hydrological_DA', u'Unipd- |

| | Smart_Enterprise_in_Cloud', u'Unipd-DEM_Sim_ICEA', u'Unipd-Plasmonics', u'Unipd-QuBiMM', u'Unipd-MedComp', u'Unipd-BigDataComputingCourse', u'Unipd-DSB---Sci.-Biomed', u |

| | 'Unipd-Notion', u'Unipd-The_role_of_trade-offs_in_competitive_ecosystems', u'Unipd-MMS_Cloud', u'Unipd-SID2016', u'Unipd-QuantumFuture', u'Unipd-Link_Translocation-DFA', |

| | u'Unipd-Hopping_Transport_in_Lithium_Niobate', u'Unipd-Negapedia', u'Unipd-SIGNET-ns3', u'Unipd-SIGNET-MATLAB', u'Unipd-QST', u'Unipd-AbinitioTransport', u'Unipd- |

| | CalcStat', u'Unipd-PhysicsOfData-students', u'Unipd-DiSePaM', u'Unipd-Few-mode-optical-fibers', u'Unipd-cleva'] |

| cpu_info | {"vendor": "Intel", "model": "SandyBridge-IBRS", "arch": "x86_64", "features": ["pge", "avx", "xsaveopt", "clflush", "sep", "syscall", "tsc-deadline", "dtes64", "stibp", |

| | "msr", "xsave", "vmx", "xtpr", "cmov", "ssse3", "est", "pat", "monitor", "smx", "pbe", "lm", "tsc", "nx", "fxsr", "tm", "sse4.1", "pae", "sse4.2", "pclmuldq", "cx16", |

| | "pcid", "vme", "mmx", "osxsave", "cx8", "mce", "de", "rdtscp", "ht", "dca", "lahf_lm", "pdcm", "mca", "pdpe1gb", "apic", "sse", "pse", "ds", "invtsc", "pni", "tm2", |

| | "aes", "sse2", "ss", "ds_cpl", "arat", "acpi", "spec-ctrl", "fpu", "ssbd", "pse36", "mtrr", "popcnt", "x2apic"], "topology": {"cores": 4, "cells": 2, "threads": 1, |

| | "sockets": 1}} |

| current_workload | 0 |

| disk_available_least | 124 |

| free_disk_gb | 146 |

| free_ram_mb | -6702 |

| host_ip | 192.168.60.150 |

| host_time | 11:56:28 |

| hypervisor_hostname | cld-blu-01.cloud.pd.infn.it |

| hypervisor_type | QEMU |

| hypervisor_version | 2010000 |

| id | 132 |

| load_average | 0.11, 0.19, 0.21 |

| local_gb | 241 |

| local_gb_used | 23 |

| memory_mb | 32722 |

| memory_mb_used | 16255 |

| running_vms | 4 |

| service_host | cld-blu-01.cloud.pd.infn.it |

| service_id | 171 |

| state | up |

| status | enabled |

| uptime | 85 days, 34 min |

| users | 1 |

| vcpus | 8 |

| vcpus_used | 19 |

+----------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

[root@cld-ctrl-01 ~]#

On Wed, Feb 27, 2019 at 11:47 AM Sean Mooney <smooney@redhat.com> wrote:

On Wed, 2019-02-27 at 09:33 +0100, Massimo Sgaravatto wrote:
> In the dashboard of my OpenStack Ocata cloud I see that the reported memory usage is wrong for the hypervisors.
> As far as I understand that information should correspond to the "used_now" field of the "nova host-describe"
nova host-describe has been removed in later version of nova.
> command. And indeed considering an hypervisor:
>
>
> # nova host-describe cld-blu-01.cloud.pd.infn.it
> +-----------------------------+----------------------------------+-----+-----------+---------+
> | HOST | PROJECT | cpu | memory_mb | disk_gb |
> +-----------------------------+----------------------------------+-----+-----------+---------+
> | cld-blu-01.cloud.pd.infn.it | (total) | 8 | 32722 | 241 |
> | cld-blu-01.cloud.pd.infn.it | (used_now) | 19 | 16259 | 23 |
> | cld-blu-01.cloud.pd.infn.it | (used_max) | 19 | 38912 | 95 |
> | cld-blu-01.cloud.pd.infn.it | b08eede75d5e4be4b0fe21e68fa9c688 | 1 | 2048 | 20 |
> | cld-blu-01.cloud.pd.infn.it | 7890b3e262264529a19f9743cf2f14bc | 16 | 32768 | 50 |
> | cld-blu-01.cloud.pd.infn.it | 4d8187cffa6a4085ad4a357b8a5afc03 | 2 | 4096 | 25 |
> +-----------------------------+----------------------------------+-----+-----------+---------+
>
>
> So for the memory it reports 16259 for used_now, while as far as far I understand it should be 38912 + the memory used
> by the hypervisor
>
> Am I missing something ?
the hypervisors api's memory_mb_used is (reserved memory + total of all memory associtate with instance on the host).
i would have expected used_now to reflect that.
what does "openstack hypervisor show cld-blu-01.cloud.pd.infn.it" print.

>
> Thanks, Massimo
>