Starting to think I really need to add the PK myself to the tables lacking it.
Despreately need a read replica for mysql load balancing, but without PK in all tables will just run to more problems.
Quoting AI:
Despreately need a read replica for mysql load balancing, but without PK in all tables will just run to more problems.
Quoting AI:
In standard MySQL replication, while it is not strictly required for tables to have a primary key for replication to function, it is highly recommended. Here’s why:
Importance of Primary Keys in Replication
Performance:
Update/Delete Operations: Without a primary key or a unique key, MySQL must use a full table scan to locate the rows that need to be updated or deleted. This can significantly slow down the replication process and increase the load on the replica server.
Replication Lag: The absence of primary keys can cause higher replication lag because finding rows to update or delete becomes more time-consuming.
Data Consistency:
Ensuring Uniqueness: Primary keys ensure that each row can be uniquely identified, reducing the risk of data anomalies during replication.
Conflict Resolution: In multi-threaded replication, primary keys help in efficiently resolving conflicts and maintaining data integrity.
Statistics: Posted by Foxina — Sat Jun 08, 2024 6:25 am