Graph with Gaps in Zabbix – Need Advice

[dpmag]

Hello everyone!

Has anyone encountered an issue with graphs showing dotted gaps?
I am running close to 9,000 hosts in Zabbix 5.0 and Zabbix 7.0 and I am experiencing the same issue.

Please advise on what could be causing this and how I can resolve it.

[PavelZ]

It looks like some data collection is being skipped. Do you have any fping program startup errors in the server log?

If you changed the settings in this template and added Preprocessing and Discard unchanged, the graph may also seem dotted. But the picture doesn't look like your case. I'm just mentioning it as one of the possible reasons.

[dpmag]

Hi PavelZ - There's error logs with fping noticed with missing directory, I have resolved it and the below output is for fping. Discard unchanged has been removed as well but the problem with graph with gaps still persist.
What else can I check to solve this issue? Please advise.

Error Logs:

Cannot execute "/usr/sbin/fping -c1 -t50 -i0": Cannot create temporary file "/var/lib/zabbixsrv/tmp/zabbix_server_6bJGNO": [2] No such file or directory

Fix:

sudo mkdir -p /var/lib/zabbixsrv/tmp
sudo chown zabbix:zabbix /var/lib/zabbixsrv/tmp
sudo chmod 750 /var/lib/zabbixsrv/tmp

Output:

[root@zabbix-server ~]# ls -l /usr/sbin/fping
-rwsr-xr-x. 1 root root 69304 Jul 6 2022 /usr/sbin/fping
[root@zabbix-server ~]# sudo systemctl restart zabbix-server
[root@zabbix-server ~]# sudo -u zabbix /usr/sbin/fping -c1 -t50 -i0 8.8.8.8
8.8.8.8 : [0], 64 bytes, 1.60 ms (1.60 avg, 0% loss)

8.8.8.8 : xmt/rcv/%loss = 1/1/0%, min/avg/max = 1.60/1.60/1.60
[root@zabbix-server ~]#

[PavelZ]

I don't have a precise understanding. I only have assumptions:
For example, you have a lot of hosts. Sometimes network equipment doesn't take this well. Some kind of storm control may be enabled.

If you can't figure out what to reconfigure in the network, I can suggest setting up several zabbix_proxy.
This will make the checks more distributed and will probably allow you to bypass the restrictions.

By the way, this template didn't have the discard unchanged setting. You added it.