Moving the topic from 3.2.x support discussion here.
Original:
Table phpbb_acl_groups does not have any PRIMARY KEY.
TLDNR: On a busy site (more than 5 million page requests per day), the database server gets overloaded
A HA clustering DB server should be used.
Most MySQL Clustering systems depend on InnoDB tables, but for the actual clustering system to work, all tables must have a primary key.
Otherwise you will get errors like this when trying to start the replication:
Original:
Table phpbb_acl_groups does not have any PRIMARY KEY.
TLDNR: On a busy site (more than 5 million page requests per day), the database server gets overloaded
A HA clustering DB server should be used.
Most MySQL Clustering systems depend on InnoDB tables, but for the actual clustering system to work, all tables must have a primary key.
Otherwise you will get errors like this when trying to start the replication:
[Repl] Plugin group_replication reported: 'Table phpbb_acl_groups does not have any PRIMARY KEY. This is not compatible with Group Replication.'
Statistics: Posted by Foxina — Sun Mar 03, 2024 9:45 am