Explain the concept of fragment elimination in Informix?

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In certain circumstances, Informix can eliminate fragments from a search. When this occurs, system resources such as CPU cycles, cache buffers, and LRU queues are freed for other operations. Whether fragment elimination can occur depends on the form of the query and the distribution scheme of the table being searched. In brief, this can happen when the query is equality-based and uses filters on the same columns as those that define the fragmentation scheme.

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