Why Does My MySQL Autoincrement Jump by 10 in a Circular Replication Setup?

Troubleshooting MySQL Autoincrement Increment

When dealing with autoincrement columns in MySQL, it's possible to encounter unexpected behavior where the increment value jumps by 10. This issue arises when the server uses circular replication for master-master support.

Why Does it Increment by 10?

ClearDB configures MySQL to use a specific offset and increment the auto-increment value by 10. This is done to prevent conflicts between different masters. By skipping certain keys and using a larger increment, MySQL ensures that the masters don't assign the same keys to records.

Is it a Problem?

While this approach is used for technical reasons, it doesn't pose any significant problems in most scenarios. However, it's important to be aware of the behavior and consider any potential implications in your database design.

Solution

If you encounter this issue and it's causing a problem in your application, there are limited options. The auto_increment_increment is controlled by ClearDB for replication purposes, and you shouldn't change it. Instead, you can adapt your application to account for the larger increment when fetching or manipulating records with auto-increment keys.

The above is the detailed content of Why Does My MySQL Autoincrement Jump by 10 in a Circular Replication Setup?. For more information, please follow other related articles on the PHP Chinese website!