I am getting always the unpolled devices warning but if I go to Poller -> history, all the devices have been polled within 10 minutes and none of them lasts more than 50seconds polling.
I have verified that system time and mysql time are same.
Php has also the correct timezone.
Here is the validate.php output:
|DB Schema||2019_05_30_225937_device_groups_rewrite (135)|
[OK] Composer Version: 1.8.6
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct
[WARN] Some devices have not been polled in the last 5 minutes. You may have performance issues.
Check your poll log and see: http://docs.librenms.org/Support/Performance/
If I go to the polling history of one of this devices, shows that polling time takes 2.5seconds and las polling has been 8 minutes ago.
What am I doing wrong?