Storage Engines in MySQL (InnoDB vs MyISAM)

Back to MySQL & Prisma
Arjit Sharma
01 Min

A storage engine is the underlying component responsible for:

  • storing table data,
  • managing indexes,
  • handling locks,
  • and controlling transaction behavior.

In MySQL, different storage engines provide different features and performance characteristics.

Historically, MySQL supported multiple storage engines for different workloads.

Today, most modern applications primarily use:

It is designed for reliability, concurrency, transactions and production workloads.

Key Features of InnoDB

  • ACID Compliance
  • Row-level locking - InnoDB locks individual rows instead of entire tables.
  • Foreign keys Support
  • MVCC (Multi-Version Concurrency Control) - Allows readers and writers to operate concurrently while reducing locking conflicts.

MyISAM (Legacy Storage Engine)

It was historically popular because was simpler, lightweight and fast for certain read-heavy workloads. However, it lacks many modern database features.

Limitation of MyISAM

  • Table-level locking - MyISAM locks entire tables during writes. This reduces concurrency significantly under heavy workloads.
  • No foreign key support - Referential integrity must be handled manually by the application.
  • No Transactions - MyISAM does not support transactions, rollbacks or ACID gurantees.

Creating a Table with a Specific Engine

CREATE TABLE users (
  id BIGINT PRIMARY KEY,
  email VARCHAR(255)
)
ENGINE = InnoDB;
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