Pi-hole V6 Intermittently slow

Just upgraded 2 piHoles to V6 - using round robin between the two

After upgrade - the GUI is VERY slow (2 min) to load. Once it loads, I see queries come in rapidly for about 2-5 minutes and the GUI will refresh very fast. Then I see a spinner on refresh and all my clients time or say "temporary name service failure" - after GUI reloads, all is fine again for about 2-5 minute; then the whole cycle repeats

https://tricorder.pi-hole.net/FxlK6VwA/
https://tricorder.pi-hole.net/HnlmhB77/

i had the same issue, everything took visible pauses before things loaded it was sometimes not load at all until i refreshed it. i disabled port 443 and just set it use port 80 and BOOM now its all snappy and super fast... although i would like to HTTPS mine but that's another issue i will come back to later

Tried that - no joy here

see if this small guide helps you out... for my case it fixed my slow/freezing issues after update to v6: Free Up Pi-Hole Disk Space Usage

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Update - I "solved" this by doing

pihole uninstall

and then a fresh install

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Hi folks. I can confirm the solution by n7qnm. I´ve done a backup of all my settings, did a pihole uninstall and a fresh install. After restoring my settigns-backup, everythig was smooth and fast again.

Right after the update to v6 it was very slow and unreliable. One of two cores was constantly at 100%. Now the performance problems are totally gone.

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