Dear Adam,

> If things are occasionally un-discovered by discovery, it’s likely that you either have some network connectivity issues or you have an intervening firewall that’s doing some arbitrary filtering.

But, other VMs on the same Host are normal. It just happened randomly in a random VM. Network connectivity is normal if I see on the monitoring, there's no RTO in The Dude or PRTG (icmp monitoring).


> Broken SNMP queries can cause things to be removed, because it looks like the entities have vanished from the device.

Does observium have a log how to check the issue about this ? and how to prevent SNMP queries being broken ? because our client sometimes asks us why their RAM/CPU graphs are missing.

If I look in the log on the missing VM graph, I found this example :
2020-09-19 01:01:26 172.16.111.2 Mempools: 2 added.
2020-09-19 01:01:26 Physical Memory Memory pool added: mib HOST-RESOURCES-MIB, index 4, descr Physical Memory
2020-09-19 01:01:26 Virtual Memory Memory pool added: mib HOST-RESOURCES-MIB, index 3, descr Virtual Memory
2020-09-18 12:48:44 172.16.111.2 Mempools: 2 deleted.
2020-09-18 12:48:44 Memory pool removed: mib HOST-RESOURCES-MIB, index 4, descr Physical Memory
2020-09-18 12:48:44 Memory pool removed: mib HOST-RESOURCES-MIB, index 3, descr Virtual Memory

I've check the resource of observium server when poller cron is running and get the result below:

CPU: all 8 core Cpu > 95%

RAM 12 GB
# free -m
              total        used        free      shared  buff/cache   available
Mem:          11847        1162        1368        8937        9316        1357
Swap:          8191        7275         916

After poller finished, the CPU became normal again but the RAM was still high.

Thank you.

Demikian yang dapat kami sampaikan, terimakasih.

Regards,
Aulia Rahman



On Mon, Oct 12, 2020 at 7:30 PM Adam Armstrong via observium <observium@observium.org> wrote:

If things are occasionally un-discovered by discovery, it’s likely that you either have some network connectivity issues or you have an intervening firewall that’s doing some arbitrary filtering.

 

Broken SNMP queries can cause things to be removed, because it looks like the entities have vanished from the device.

 

Adam.

 

From: observium <observium-bounces@observium.org> On Behalf Of Aulia Rahman via observium
Sent: 12 October 2020 11:06
To: observium@observium.org
Cc: Aulia Rahman <aul@mybati.co.id>
Subject: [Observium] Why sometime graph are missing on the dashboard ?

 

Dear All,

 

I've sometimes found that some server graph RAM / CPU / Traffic is missing on the dashboard. So, I can't view the graph at that time.

 

But when I check on the next time, that graph shows again.

 

What caused it and how to solve it ?

 

My detail specs:

 

Device Monitor: 400++ VM (various OS Linux & Windows)

CPU: 8 Core

RAM: 12 GB ( Use Ramdisk )

Storage: 500 GB on SSD

Observium 20.1.10233 (20th January 2020)
OS Linux 3.10.0-514.el7.x86_64 [amd64] (CentOS 7)
Apache 2.4.6 (CentOS) OpenSSL/1.0.1e-fips PHP/7.0.19
PHP 7.0.19 (OPcache: ENABLED)
Python 2.7.5
MySQL 5.5.52-MariaDB (extension: mysqli 5.5.52-MariaDB)


Demikian yang dapat kami sampaikan, terimakasih.

 

Regards,

Aulia Rahman

 

 

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