What is Multi-Version Concurrency Control (MVCC) in DBMS?
Multi-Version Concurrency Control is a technology, utilized to enhance databases by resolving concurrency problems and also data locking by preserving older database versions. When many tasks attempt to update the same piece of data simultaneously, MVCC causes a conflict and necessitates a retry from one or more of the processes.
What is Multi-Version Concurrency Control (MVCC) in DBMS?
Multi-Version Concurrency Control (MVCC) is a database optimization method, that makes redundant copies of records to allow for safe concurrent reading and updating of data. DBMS reads and writes are not blocked by one another while using MVCC. A technique called concurrency control keeps concurrent processes running to avoid read/write conflicts or other irregularities in a database.
Whenever it has to be updated rather than replacing the old one with the new information an MVCC database generates a newer version of the data item.