indexer.conf
Enables or disables storing links between pages - for popularity rank.
Versions prior to 3.3.0 implicitly collected links between crawled pages. Starting from 3.3.0, the default behaviour is not to collect links between the pages, for indexing performance purposes, which is reached by not pupulating the "links" table. As a side effect PopRank calculation is not possible in the default configuration. If PopRank is important for your installation, please specify "CollectLinks yes" in indexer.conf.