MySQL 8.0 Release Notes
MySQL 8.0 Source Code Documentation
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To implement a large-scale, busy, or highly reliable database
application, to port substantial code from a different database
system, or to tune MySQL performance, it is important to understand
InnoDB locking and the InnoDB
transaction model.
This section discusses several topics related to
InnoDB locking and the InnoDB
transaction model with which you should be familiar.
Section 15.7.1, “InnoDB Locking” describes lock types used by
InnoDB.Section 15.7.2, “InnoDB Transaction Model” describes transaction isolation levels and the locking strategies used by each. It also discusses the use of
autocommit, consistent non-locking reads, and locking reads.Section 15.7.3, “Locks Set by Different SQL Statements in InnoDB” discusses specific types of locks set in
InnoDBfor various statements.Section 15.7.4, “Phantom Rows” describes how
InnoDBuses next-key locking to avoid phantom rows.Section 15.7.5, “Deadlocks in InnoDB” provides a deadlock example, discusses deadlock detection and rollback, and provides tips for minimizing and handling deadlocks in
InnoDB.