Amount domains to be handled by pi-hole

[yubiuser]

Pihole v5.0 is very fast and doesn't store all the domains in memory (only the index as B-tree, which is much smaller) As long as you have enough disk space it should be fine. I see limitations more with the number of concurrent clients/queries than with the number of domains on the blocklist. Or as the developers say it:

@DL6ER

Behind the scenes, we’re currently redesigning critical portions of our FTL daemon to remove some of the fundamental bottlenecks we always carried around. This includes using a B-tree (self-balancing binary tree ) for domains.
Due to using this tree for searching, we do not need to load all the domains into memory and startup time of FTL is greatly reduced (in fact, there is virtually no difference between having 10,000 or 10,000,000 domains on the gravity list). As a side effect, one could say that we remove any limitation on the size of the gravity list.
Obviously, nothing comes at no costs, however, we shift the cost of building the tree to the (weekly) run of pihole -g instead of to the start of pihole-FTL to cover this.

An other point is: is it useful to have so many domains on the blocklist...?