On at least enwiki, there is a "namespaces" database table that appears to be unused and unneeded.
Its schema:
MariaDB [enwiki_p]> describe namespaces;
+-------+---------+------+-----+---------+-------+
Field | Type | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+-------+
i | int(11) | YES | NULL | ||
v | blob | YES | NULL | ||
+-------+---------+------+-----+---------+-------+
2 rows in set (0.03 sec)
Its contents:
MariaDB [enwiki_p]> select * from namespaces;
+------+----------------+
i | v |
+------+----------------+
0 | |
1 | Talk |
2 | User |
3 | User_talk |
4 | Wikipedia |
5 | Wikipedia_talk |
6 | Image |
7 | Image_talk |
8 | MediaWiki |
9 | MediaWiki_talk |
10 | Template |
11 | Template_talk |
12 | Help |
13 | Help_talk |
14 | Category |
15 | Category_talk |
+------+----------------+
16 rows in set (0.03 sec)
This database table should be dropped from all Wikimedia wikis.
Version: wmf-deployment
Severity: enhancement