In database management systems, block contention refers to multiple processes or instances competing for access to the same index or data block at the same time. In general this can be caused by very frequent index or table scans, or frequent updates. Concurrent statement executions by two or more instances may also lead to contention, and subsequently Busy waiting for the process without the lock.
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Famous quotes containing the words block and/or contention:
“The chess pieces are the block alphabet which shapes thoughts; and these thoughts, although making a visual design on the chess-board, express their beauty abstractly, like a poem.... I have come to the personal conclusion that while all artists are not chess players, all chess players are artists.”
—Marcel Duchamp (1887–1968)
“Contention is inseparable from creating knowledge. It is not contention we should try to avoid, but discourses that attempt to suppress contention.”
—Joyce Appleby (b. 1929)