Under what circumstances will a MySQL row lock degenerate into a table lock? What is the impact on performance? How to prevent it?
In a high-concurrency database environment, row lock is a fine-grained lock mechanism provided by MySQL. It allows multiple transactions to operate on different records of the same table at the same time, greatly improving the concurrency performance of the database. However, in some special cases, row lock may degenerate into table lock, causing the entire table to be locked, thus significantly reducing concurrency performance. This article will deeply analyze the implementation principle of row lock in MySQL, the triggering conditions and reasons for degenerating into table lock, and provide...
How does MySQL implement locks? What are row locks and table locks? The relationship between locks and indexes
In MySQL, locks are the key mechanism to ensure concurrency control, data consistency, and transaction isolation. With the growth of database applications, how to efficiently manage concurrent operations has become a core issue in database performance optimization. MySQL provides a variety of lock mechanisms, including row locks and table locks, and implements the ACID characteristics of transactions through the close integration of lock mechanisms and indexes. In this article, we will explore in depth the implementation of MySQL locks, the difference between row locks and table locks, and the relationship between locks and indexes, to help developers...