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/** @brief The maximum number of chunks to allocate for a table cache.
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The rows of a table cache are stored in a set of chunks. When a new
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first one is 1024 rows (TABLE_CACHE_INITIAL_ROWSNUM) and each
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subsequent is N/2 where N is the number of rows we have allocated till
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now, then 39th chunk would accommodate 1677416425 rows and all chunks