Why Does Stale Data Persist in MySQL After Deletes and Inserts?

Why Stale Data Reemerges in MySQL After Delete and Insert Operations?

Your issue arises from the default isolation level of MySQL, denoted as "REPEATABLE READ," which hinders changes made after a transaction's initiation from being visible. Despite the commitment of these modifications, other connections may not reflect them.

Overcoming Stale Data

To remedy this situation, you have two options:

1. Execute Commit or Rollback: By issuing a COMMIT or ROLLBACK command in the affected sessions, the ongoing transaction will conclude, allowing the committed alterations to be visible.
2. Alter Isolation Level: Alternatively, you can change the isolation level for the problematic sessions to "READ COMMITTED." This modification ensures that changes are observable immediately after their commitment.

Checking your MySQL documentation for options to modify the default isolation level may also be beneficial.

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