Randomized page weights for optimizing buffer pool page reuse
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United States of America Patent
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Nov 4, 2014
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N/A
app pub date -
Jul 27, 2012
filing date -
Jul 27, 2012
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Abstract
In general, the disclosure is directed to techniques for choosing which pages to evict from the buffer pool to make room for caching additional pages in the context of a database table scan. A buffer pool is maintained in memory. A fraction of pages of a table to persist in the buffer pool are determined. A random number is generated as a decimal value of 0 to 1 for each page of the table cached in the buffer pool. If the random number generated for a page is less than the fraction, the page is persisted in the buffer pool. If the random number generated for a page is greater than the fraction, the page is included as a candidate for eviction from the buffer pool.
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