The implementation checklist chapter in the manual reads: Decide how often your system rebuilds the search index (4-10 min) This is outdated as we know have the koha-indexer and this cronjob is no longer needed.
Did you fix this one Ella?
I began it yesterday but did not get to finish! I will unassign it from myself and come back to it later if I get the chance.
Still a valid issue - should be removed from all supported versions of the manual as it was introduced in Koha about 9 years ago (from the Git history for debian/scripts/koha-indexer).
I no longer see this in current versions of the manual, closing bug! https://koha-community.org/manual/22.11/en/html/implementation_checklist.html