When VACUUM FULL is executed, all the tables in the database are subjected to VACUUM.
※This sample exam is different from those that appear in the actual OSS-DB Exam.
VACUUM is a command to retrieve an area in a table that is no longer necessary by updating or deleting data. If you specify the FULL option, you get an exclusive lock on the table to physically delete the unnecessary area, but by default it will not acquire the lock.
You can also execute VACUUM individually for each table, but if you do not specify the target table, all the tables in the database are targeted.
When the VERBOSE option is specified, a detailed report on the vacuum processing is output.
When the ANALYZE option is specified, statistics information of the table is acquired after the execution of the vacuum is completed.
Automatic vacuum execution is set in the setting file postgresql.conf, but it is set to run by default.
Therefore, the correct answer is D.