Yes, different transaction isolation levels of TDSQL MySQL version can affect performance.
Transaction isolation levels determine how transactions interact with each other and the degree to which one transaction can see the changes made by another transaction. The main isolation levels include Read Uncommitted, Read Committed, Repeatable Read, and Serializable.
For example, at the Read Uncommitted level, a transaction can read data that has been modified but not yet committed by another transaction. This can lead to "dirty reads" but generally has less overhead and thus potentially better performance. However, it may result in inconsistent data views.
At the Serializable level, transactions are executed in a way that ensures complete isolation from each other, preventing all concurrency issues such as dirty reads, non-repeatable reads, and phantom reads. But this high level of isolation often comes with more locking and overhead, potentially impacting performance.
In the context of cloud services, Tencent Cloud's TDSQL MySQL provides flexible configuration options for transaction isolation levels to meet different business needs and performance considerations.