[Starlingx-discuss] Alarm "Memory threshold"

Thu Feb 18 14:52:34 UTC 2021

Yes, you can modify the host memory reservation via system command.

# system host-memory-modify -m <Platform Reserved MiB> <hostname or id> <processor>
system host-memory-modify -m 6400 1 0

# show current memory configuration
system host-memory-show <hostname or id> <processor>
system host-memory-list <hostname or id>

Tao

From: open infra <openinfradn at gmail.com>
Sent: Wednesday, February 17, 2021 9:55 PM
To: Ildiko Vancsa <ildiko.vancsa at gmail.com>
Cc: Rai, Ankush <Ankush.Rai at commscope.com>; starlingx-discuss at lists.starlingx.io
Subject: Re: [Starlingx-discuss] Alarm "Memory threshold"

[Please note: This e-mail is from an EXTERNAL e-mail address]
Hi,

Is there a way we can adjust memory and CPU of controller-0 before we deploy starlingx?
In my case without having a single VM under OpenStack has following memory usage though host machine (I use AIO simplex on the virtualized environment) has enough memory.

controller-0:~$ free -m
              total        used        free      shared  buff/cache   available
Mem:          17894       11131         406          65        6356        5967
Swap:             0           0           0

On Sun, Feb 14, 2021 at 7:55 PM Ildiko Vancsa <ildiko.vancsa at gmail.com<mailto:ildiko.vancsa at gmail.com>> wrote:
Hi,

I saw that you have a ‘reserved for platform’ memory entry with the value of 4600 MiB.

I’ve found entries below that report platform memory usage having an over 100% value:

daemon.log:2021-02-14T07:14:55.000 controller-0 collectd[130887]: info platform memory usage: Usage: 114.7%; Reserved: 4600.0 MiB, Platform: 5274.3 MiB (Base: 4684.1, k8s-system: 590.2), k8s-addon: 0.0

So while the overall memory usage in the system isn’t over the threshold I assume the usage of that reserved amount of memory still exceeds it. Have you seen any configuration option to increase the amount of platform memory?

You can also look into collectd if that leads you closer to what it is reading to get those values.

I don’t have access to a StarlingX install to look into this, so I cannot tell where to look for that.

I found some documentation for Kubernetes to set memory limits, but I’m not sure that applies here. (https://kubernetes.io/docs/tasks/administer-cluster/manage-resources/memory-default-namespace/)

Have you looked into the above already?

Thanks,
Ildikó

> On Feb 14, 2021, at 10:51, Rai, Ankush <Ankush.Rai at commscope.com<mailto:Ankush.Rai at commscope.com>> wrote:
>
> Not sure exactly which log file to check. Captured some data here, please check if this can help.
>
> Software Version: 20.06
> Memory:
> Reserved for Platform: 4600 MiB
> Usable Total: 13293 MiB
> Available: 13293 MiB
>
> The fm has logged these events.
>
> fm-event.log:2021-02-10T08:57:25.000 controller-0 fmManager: info { "event_log_id" : "100.103", "reason_text" : "Platform Memory threshold exceeded ; threshold 80.00%, actual 88.83%", "entity_instance_id" : "region=RegionOne.system=6e232236-df0a-4bc5-9006-76f782b5493f.host=controller-0", "severity" : "major", "state" : "set", "timestamp" : "2021-02-10 08:57:25.484131" }
> fm-event.log:2021-02-10T09:17:55.000 controller-0 fmManager: info { "event_log_id" : "100.103", "reason_text" : "Platform Memory threshold exceeded ; threshold 90.00%, actual 95.19%", "entity_instance_id" : "region=RegionOne.system=6e232236-df0a-4bc5-9006-76f782b5493f.host=controller-0", "severity" : "critical", "state" : "set", "timestamp" : "2021-02-10 09:17:55.482154" }
>

[snip]

>
> From: Ildiko Vancsa <ildiko.vancsa at gmail.com<mailto:ildiko.vancsa at gmail.com>>
> Sent: Sunday, February 14, 2021 2:42 PM
> To: Rai, Ankush <Ankush.Rai at commscope.com<mailto:Ankush.Rai at commscope.com>>
> Cc: starlingx-discuss at lists.starlingx.io<mailto:starlingx-discuss at lists.starlingx.io>
> Subject: Re: [Starlingx-discuss] Alarm "Memory threshold"
>
>
> Hi Ankush,
>
> Do you have any log entries on the system you could share here that show the memory readings the alarm might be triggered by?
>
> Thanks,
> Ildikó
>
>
> > On Feb 14, 2021, at 09:26, Rai, Ankush <Ankush.Rai at commscope.com<mailto:Ankush.Rai at commscope.com>> wrote:
> >
> > Hi,
> >
> > Below alarm is getting raised for every node of the central and edge cloud.
> >
> > “Platform Memory threshold exceeded ; threshold 90.00%, actual 95.19%”
> >
> > It looks to be the false alarm as nodes are having enough available memory. Please config the root cause of this alarm.
> >
> > Thanks,
> > Ankush
> >
> >
> > _______________________________________________
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