I have looked at the db schema for the following tables: page,revision,comment,actor,slot,content,user,text,revision_comment_temp,revision_actor_temp,recentchanges,watchlist Presumably that is good enough :-) I ran my checker on both eqiad and codfw: python3 check_table_structures.py.new --sections s1 --tables page,revision,comment,actor,slot,content,user,text,revision_comment_temp,revision_actor_temp,recentchanges,watchlist --sett ings {eqiad or codfw}.conf --verbose The following settings are (mostly) ignored in the diff: AUTO_INCREMENT,DEFAULT,ROW_FORMAT,AVG_ROW_LENGTH All diffs are against the master for s1 in either dc. Mariadb versions are printed out first in case those turn out to be relevant. eqiad: dbhost: db1084 version: 10.4.13-MariaDB-log dbhost: db1106 version: 10.1.43-MariaDB dbhost: db1118 version: 10.4.14-MariaDB-log dbhost: db1119 version: 10.4.13-MariaDB-log dbhost: db1083 version: 10.1.43-MariaDB dbhost: db1135 version: 10.4.14-MariaDB-log dbhost: db1099:3311 version: 10.4.13-MariaDB-log dbhost: db1134 version: 10.1.44-MariaDB dbhost: db1105:3311 version: 10.4.12-MariaDB-log dbhost: db1091 version: 10.4.14-MariaDB-log dbhost: db1089 version: 10.1.43-MariaDB master: db1083 wiki: enwiki DIFFS **** common results for hosts: ['db1091', 'db1105:3311', 'db1084', 'db1135'] repl table comment column comment_data mismatch blob DEFAULT NULL common results for hosts: ['db1083', 'db1089', 'db1134'] common results for hosts: ['db1099:3311'] table user has parameters KEY_BLOCK_SIZE extra on replica db1099:3311 wiki enwiki table revision has parameters KEY_BLOCK_SIZE extra on replica db1099:3311 wiki enwiki repl table comment column comment_data mismatch blob DEFAULT NULL table recentchanges has parameters KEY_BLOCK_SIZE extra on replica db1099:3311 wiki enwiki table text has parameters KEY_BLOCK_SIZE extra on replica db1099:3311 wiki enwiki table page has parameters KEY_BLOCK_SIZE extra on replica db1099:3311 wiki enwiki table watchlist has parameters KEY_BLOCK_SIZE extra on replica db1099:3311 wiki enwiki common results for hosts: ['db1106'] common results for hosts: ['db1119'] repl table comment column comment_data mismatch blob DEFAULT NULL common results for hosts: ['db1118'] repl table comment column comment_data mismatch blob DEFAULT NULL -------- codfw: dbhost: db2088:3311 version: 10.4.13-MariaDB-log dbhost: db2116 version: 10.4.13-MariaDB-log dbhost: db2085:3311 version: 10.4.12-MariaDB-log dbhost: db2072 version: 10.1.43-MariaDB dbhost: db2130 version: 10.4.13-MariaDB-log dbhost: db2071 version: 10.4.13-MariaDB-log dbhost: db2103 version: 10.1.43-MariaDB dbhost: db2112 version: 10.1.43-MariaDB dbhost: db2092 version: 10.4.13-MariaDB-log master: db2112 wiki: enwiki DIFFS **** common results for hosts: ['db2112', 'db2072', 'db2103'] common results for hosts: ['db2088:3311', 'db2130', 'db2085:3311', 'db2116', 'db2071'] repl table comment column comment_data mismatch blob DEFAULT NULL common results for hosts: ['db2092'] table user has master parameters KEY_BLOCK_SIZE missing on replica db2092 wiki enwiki table watchlist has master parameters KEY_BLOCK_SIZE missing on replica db2092 wiki enwiki table text has master parameters KEY_BLOCK_SIZE missing on replica db2092 wiki enwiki repl table comment column comment_data mismatch blob DEFAULT NULL table page has master parameters KEY_BLOCK_SIZE missing on replica db2092 wiki enwiki table recentchanges has master parameters KEY_BLOCK_SIZE missing on replica db2092 wiki enwiki table revision has master parameters KEY_BLOCK_SIZE missing on replica db2092 wiki enwiki