wf-hoover table

I found below info with a quick Google search. My wf_hoover table is empty so below makes sense.

“…The wf_hoover table is used to temporarily store URL’s found during a scan before we check them against the Google Safe Browsing (GSB) list of known malware and phishing URLs. This is used during a scan and in other places we check things against the GSB. It can be cleared manually but not during a scan. I would deactivate Wordfence and then do so. It should truncate and clear on each scan by itself. The size might be an indication you have many many url’s we have to check. Reactivate plugin after the clear and start a new scan. It might be really interesting to note what the size reports after the new scan.”
from — https://ww.wp.xz.cn/support/topic/emptying-wfhoover-database-table

I’m not highly impressed by the Worfence scanning, though I like Wordfence and use the P version on three websites. The scanning is reactive, it’s not essential. I’d suggest simply unchecking all scan options and see how it goes, then gradually introduce. As for using Worfence as “backup” I don’t understand, but if you mean you’re running it along with other major security plugins I’d advise caution. In my experience, Wordfence runs best without other security plugins active (and indeed, taking care with plugin conflicts in general). In my case, I’ve found that using a combination of Wordfence P, login hiding, .htaccess tweaks and server firewall (combined with best practices) gives me excellent security.

MTN