Posted by: @yipiash

1. thanks.
2. I already tried it, and tried these as well: https://wpforo.com/community/faq/forum-is-slow/

Still those errors and notices are being logged and users see 504, 524 (apache) and 404(nginx) errors and memory surge as well.

I don't see any point to try the topic you're referring.

Why haven't you excluded the forum page from your cache plugin yet? You should do nothing but find a way to exclude the forum page from your cache plugin. The forum is paralyzed by your cache solution. Please read this FAQ topic for more information and follow to the instruction: https://wpforo.com/community/faq/wpforo-and-cache-plugins/