Multiversion concurrency control (MCC or MVCC), is a non-locking concurrency control method commonly used by database management systems to provide concurrent access...

databases, non-lock concurrency control is a concurrency control method used in relational databases without using locking. There are several non-lock concurrency...

Optimistic concurrency control (OCC), also known as optimistic locking, is a non-locking concurrency control method applied to transactional systems such...

Java ConcurrentMap#Lock-free atomicity Liveness Lock (computer science) Mutual exclusion Priority inversion Resource starvation Non-lock concurrency control...

operating systems, multiprocessors, and databases, concurrency control ensures that correct results for concurrent operations are generated, while getting those...

In computer science, a timestamp-based concurrency control algorithm is a optimistic concurrency control method. It is used in some databases to safely...

of rolling back transactions, if concurrency conflicts occur. Pessimistic concurrency is best implemented when lock times will be short, as in programmatic...

In databases and transaction processing, two-phase locking (2PL) is a pessimistic concurrency control method that guarantees conflict-serializability. It...

different tradeoffs with regards to concurrency and starvation. Read-preferring RW locks allow for maximum concurrency, but can lead to write-starvation...

which simplifies concurrency control.[citation needed] The main challenge in designing concurrent programs is concurrency control: ensuring the correct...

strategies used to prevent non-repeatable reads and phantom reads. In the first strategy, lock-based concurrency control, transaction 2 is committed...

mode, no other transactions can have locked any ancestor in X mode. Atomicity (programming) Concurrency control Lock (computer science) Jim Gray; Raymond...

blocking and others are non-blocking (examples can be found in the Java concurrency software library). The safety properties of concurrent data structures must...

completes. Two-phase locking is often applied to guarantee full isolation. An alternative to locking is multiversion concurrency control, in which the database...

science, a ticket lock is a synchronization mechanism, or locking algorithm, that is a type of spinlock that uses "tickets" to control which thread of execution...

science, a lock convoy is a performance problem that can occur when using locks for concurrency control in a multithreaded application. A lock convoy occurs...

read/write concurrency. Concurrency control Copy-on-write Lock (computer science) Lock-free and wait-free algorithms Multiversion concurrency control Pre-emptive...

In computer science, mutual exclusion is a property of concurrency control, which is instituted for the purpose of preventing race conditions. It is the...

should be held for the least time possible. Multiversion concurrency control (MVCC) Readers–writer lock Gray, Jim & Reuter,f (1993), Distributed Transaction...

included in a schedule. Schedules are fundamental concepts in database concurrency control theory. In practice, most general purpose database systems employ...

centralized version control system, because all branches and revision history are copied to the local machine by default. The lack of locking mechanisms that...

the concurrency anomalies that serializability avoids (but not all). In practice snapshot isolation is implemented within multiversion concurrency control...

threading and concurrency but not parallel execution of threads, due to a global interpreter lock (GIL). The GIL is a mutual exclusion lock held by the...

be done atomically int result = ++counter; return result; } Concurrency control Concurrent data structure Exception safety Priority inversion ThreadSafe...

general, wherein the benefit of concurrent computation is negated due to the natural requirement for concurrency control restricting contending accesses...

systems, a giant lock, also known as a big-lock or kernel-lock, is a lock that may be used in the kernel to provide concurrency control required by symmetric...

Implementations from Concurrency Kit Article "User-Level Spin Locks - Threads, Processes & IPC" by Gert Boddaert Article Spin Lock Example in Java Paper...

other threads may lock it. Recursive mutexes solve the problem of non-reentrancy with regular mutexes: if a function that takes a lock and executes a callback...

other threads from disrupting it, using a lock. Once again fixing the non-atomic counter algorithm: Acquire a lock, excluding other threads from running the...

of concurrency control: pessimistic concurrency and optimistic concurrency. When pessimistic concurrency control is being used, SQL Server controls concurrent...