I've got Linux routers monitored by Zabbix.
Some values are refreshing often (cpu load, net devices load, disk/memory usage, etc.) and some values only once a day (configuration files).
If something goes wrong with the router (eg. damage), and configuration values are 2 days old and more, Zabbix server marks them as empty.
On "latest values" screen I have to set "Display values with no data" (or something, I use Zabbix in Polish language) and only then they appear. Last check is empty. In history the values exist, I can show them using scroll and I can see yesterday's data.
Why they are marked as empty yet they have data?
Some values are refreshing often (cpu load, net devices load, disk/memory usage, etc.) and some values only once a day (configuration files).
If something goes wrong with the router (eg. damage), and configuration values are 2 days old and more, Zabbix server marks them as empty.
On "latest values" screen I have to set "Display values with no data" (or something, I use Zabbix in Polish language) and only then they appear. Last check is empty. In history the values exist, I can show them using scroll and I can see yesterday's data.
Why they are marked as empty yet they have data?