What is a negative aspect of using multi-document ACID compliant transactions?

Multi-document ACID compliant transactions in MongoDB ensure that a series of operations either all succeed or all fail, providing a reliable way to maintain data consistency across multiple documents. However, one of the negative aspects of using these transactions is that they can decrease performance due to resource locking.

When a transaction is executed, MongoDB needs to manage locks on the documents involved to ensure that the operations can be performed safely without conflicting with other operations. This locking mechanism is necessary to maintain the integrity of the transaction but can result in increased waiting times if other transactions are trying to access the same documents. As more documents are involved in a transaction, the potential for locking conflicts and performance degradation grows, particularly in environments with high throughput or concurrent transactions. Thus, while these transactions enhance data integrity, they can negatively impact overall performance by consuming additional resources and increasing response times.