Можно ли обеспечить ACID при уровне изоляции Read Committed?

The Read Committed isolation level ensures that a transaction only sees committed data, preventing dirty reads. However, it does not protect against non-repeatable reads and phantom reads.

ACID includes four properties:

• Atomicity
• Consistency
• Isolation
• Durability

Read Committed provides basic isolation but does not guarantee full isolation required for strict ACID, especially in terms of isolation.

Therefore, at the Read Committed isolation level, ACID cannot be fully guaranteed if isolation is understood as complete transaction isolation (e.g., Serializable). To fully guarantee isolation and prevent phantom reads, a higher level such as Serializable is needed.

Nevertheless, many DBMS implement additional mechanisms (such as locks or MVCC) that can enhance the level of isolation even at Read Committed, but this depends on the specific implementation.