The capability to perform many functions at the same time. Oracle provides for concurrency by allowing many users to access the database simultaneously.
"In multi-threaded systems, an object that could have one or more threads executing its methods and changing its state at the same time is said to be concurrent and to exhibit concurrency."
The simultaneous execution of two or more independent, and possibly competing, processes. Adaptive Server Anywhere automatically uses locking to isolate transactions and ensure that each concurrent application sees a consistent set of data. See also: transaction, lock, isolation level.
An attribute of a collection of activities that are in progress simultaneously; that is, more than one task may be observed between its initiation and termination.
The ability of two or more processes to access the same database simultaneously.
The ability to handle multiple requests simultaneously. Threads and processes are examples of concurrency mechanisms.
The appearance of simultaneous execution of processes or transactions by interleaving the execution of multiple pieces of work.
The occurrence of two or more activities during the same time interval. Concurrency can be achieved by interleaving or simultaneously executing two or more threads. See: thread.
The simultaneous use of a database or a sequential, relative, or indexed file by more than one user.
Elements of the production process which are being carried out simultaneously. Many products may be assembled in a given facility, and simultaneously accessing many of its resources. Concurrent access and usage of common resources greatly complicates the method of applying unit costs or unit profits.
Multiple users or programs simultaneously sharing the same database. Transactions and data locks are used to give each of these a consistent view of the database.
(Machine Safety) Acting in conjunction; used to describe a situation wherein two or more control devices exist in an actuated condition at the same time (but not necessarily simultaneously).
In computer science, concurrency is a property of systems which consist of computations that execute overlapped in time, and which may permit the sharing of common resources between those overlapped computations. Or in Edsger Dijkstra's own words, "Concurrency occurs when two or more execution flows are able to run simultaneously." Concurrent use of shared resources is the source of many difficulties.