How do you do PostgreSQL periodic maintenance if you have large databases with hundreds of GB large tables?

Question

PostgreSQL

How do you do PostgreSQL periodic maintenance if you have large databases with hundreds of GB large tables?
For example, a 700GB database, in which one of the tables is 600GB, there is about 350GB of free space.
By periodic maintenance I mean vacuum, reindex, analyze

Answer 1

By periodic maintenance I mean vacuum, reindex, analyze

What for?
Please note, this is a postgresql DBA question. Yes, we have tables for several terabytes.
After normal autovacuum settings for iron (instead of the default settings for any coffee maker), autovacuum normally copes with vacuum and analyze.
Instead of reindex - pgcompacttable , pg_repack , yes, at least manually or with some script create index concurrently + drop index concurrently

Answer 2

Partitioning with rotation of old data to another tablespace, LVM, preliminary assessment of the amount of space needed for the database. In extreme cases - work on the implementation of all this with downtime.
What do you mean by service in general? Version update?