MySQL 9.5 Reference Manual Including MySQL NDB Cluster 9.5
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 17.7.1, “InnoDB Locking” describes lock types used by
InnoDB.
Section 17.7.2, “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 17.7.3, “Locks Set by Different SQL Statements in InnoDB” discusses specific types of
locks set in InnoDB for various statements.
Section 17.7.4, “Phantom Rows” describes how
InnoDB uses next-key locking to avoid phantom
rows.
Section 17.7.5, “Deadlocks in InnoDB” provides a deadlock example,
discusses deadlock detection, and provides tips for minimizing
and handling deadlocks in InnoDB.