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- Optimistic_concurrency_control abstract "Optimistic concurrency control (OCC) is a concurrency control method applied to transactional systems such as relational database management systems and software transactional memory. OCC assumes that multiple transactions can frequently complete without interfering with each other. While running, transactions use data resources without acquiring locks on those resources. Before committing, each transaction verifies that no other transaction has modified the data it has read. If the check reveals conflicting modifications, the committing transaction rolls back and can be restarted. Optimistic concurrency control was first proposed by H.T. Kung.OCC is generally used in environments with low data contention. When conflicts are rare, transactions can complete without the expense of managing locks and without having transactions wait for other transactions' locks to clear, leading to higher throughput than other concurrency control methods. However, if contention for data resources is frequent, the cost of repeatedly restarting transactions hurts performance significantly; it is commonly thought that other concurrency control methods have better performance under these conditions. However, locking-based ("pessimistic") methods also can deliver poor performance because locking can drastically limit effective concurrency even when deadlocks are avoided.".
- Optimistic_concurrency_control wikiPageExternalLink multi-isolation-part-1.pdf.
- Optimistic_concurrency_control wikiPageID "233011".
- Optimistic_concurrency_control wikiPageRevisionID "604720875".
- Optimistic_concurrency_control hasPhotoCollection Optimistic_concurrency_control.
- Optimistic_concurrency_control subject Category:Concurrency_control.
- Optimistic_concurrency_control comment "Optimistic concurrency control (OCC) is a concurrency control method applied to transactional systems such as relational database management systems and software transactional memory. OCC assumes that multiple transactions can frequently complete without interfering with each other. While running, transactions use data resources without acquiring locks on those resources. Before committing, each transaction verifies that no other transaction has modified the data it has read.".
- Optimistic_concurrency_control label "Control de concurrencia optimista".
- Optimistic_concurrency_control label "Optimistic Concurrency".
- Optimistic_concurrency_control label "Optimistic concurrency control".
- Optimistic_concurrency_control label "乐观并发控制".
- Optimistic_concurrency_control label "楽観的並行性制御".
- Optimistic_concurrency_control sameAs Optimistic_Concurrency.
- Optimistic_concurrency_control sameAs Control_de_concurrencia_optimista.
- Optimistic_concurrency_control sameAs 楽観的並行性制御.
- Optimistic_concurrency_control sameAs m.01hwbw.
- Optimistic_concurrency_control sameAs Q1779327.
- Optimistic_concurrency_control sameAs Q1779327.
- Optimistic_concurrency_control wasDerivedFrom Optimistic_concurrency_control?oldid=604720875.
- Optimistic_concurrency_control isPrimaryTopicOf Optimistic_concurrency_control.