Whenever you want to exclude a large set of urls, it is more convenient to use UrlExcludeFile rather than UrlExclude . The argument must be a list of files with absolute paths or relative to the directory that Alkaline is run from. Each file contains a list of urls, each url must be on a single line.
Alkaline will reload the lists of urls at each full indexing roundtrip. Each url is treated as if it was written part of the list of the UrlExclude directive.