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locality of reference |
Also found in: Wikipedia | 0.04 sec. |
locality of referenceAlso known as "locality in space" and "spatial locality," it refers to the fact that most instructions in a program are in routines that are executed over and over, and that these routines are in a reasonably confined area. It also refers to data fields in close proximity to each other. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Read-intensive applications such as OLTP require large numbers of random read requests and represent a good locality of reference or a high hit-ratio, making it best suited as a disk-caching application. The large data set with low locality of reference results in high data cache miss rates and low (less than 30%) effective utilization of a single-threaded processor. Read caching is based on the locality of reference principle--applications are more likely to reference data that is stored in close proximity to previously referenced data than they are to reference data stored on distant areas of the disk. |
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