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DNS resolution should work continuously.
Hardware: Raspberry Pi 3 Model B Plus Rev 1.3
OS: Raspbian 9.11
Periodically pihole will stop responding to DNS queries. I haven't yet deciphered a particular pattern, but when this happens the CPU increases from roughly 10% to 30% and the 1-minute load average increases from around 0.5 to 1.5. Running pihole restartdns resolved the issue. Unfortunately I did not capture the processes with high CPU (though I'll make sure to do that next time it happens). This appears to happen less frequently than daily, it may happen once a week, I'm trying to track that better. I have excepts from pihole.log, pihole-FTL.log, and syslog for the period around the issue. Based on the information in pihole.log and collected metrics, the system stopped responding after 20-June 11:40:36 and started up again at around 11:47 after I'd restarted. (There are a couple of lines out output at 11:45:50 but it didn't seem to be responding at that time).
I did look through several similar posts but none seem to match what I'm seeing.
Where should I upload the log files?