Document units for max_slot_wal_keep_size

The doc blurb failed to mention units, as well as lacking the point
about changeability.

Backpatch to 13.

Reviewed-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Reported by: b1000101@pm.me
Discussion: https://postgr.es/m/163760291192.26193.10801700492025355788@wrigleys.postgresql.org
This commit is contained in:
Alvaro Herrera 2021-11-26 14:31:57 -03:00
parent 44bd3ed332
commit 013bb6c8c0
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@ -4175,6 +4175,9 @@ restore_command = 'copy "C:\\server\\archivedir\\%f" "%p"' # Windows
to continue replication due to removal of required WAL files. You
can see the WAL availability of replication slots
in <link linkend="view-pg-replication-slots">pg_replication_slots</link>.
If this value is specified without units, it is taken as megabytes.
This parameter can only be set in the <filename>postgresql.conf</filename>
file or on the server command line.
</para>
</listitem>
</varlistentry>