The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/16/sql-cluster.html
Description:
The cloister command should describe how or deals with free pages (I.e. are
released) and what it’s lock model is (i.e. that it is (not yet?) an online
operation. It should probably also mention if it has intermittent additional
disk space requirements (or not).