Details
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Improvement
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Resolution: Unresolved
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Minor
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None
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None
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None
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9223372036854775807
Description
Some database queries end up going backwards through database files. This is most often in a "loose backwards read" manner similar to the "loose forward reads" described in LU-15100.
Currently, reading backwards results in absolutely no readahead - every access is a miss.
This ticket is to try to implement a simple 'loose backwards read'. (Backwards strided readahead is a separate challenge and is left for another time.)