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所有这些在线网站都告诉我最大化这个数字，但我如何从 MySQL 中实际检索它？我也想用它来计算已经运行的查询总数，从数学上计算出命中率与命中率。
有没有办法从 MySQL 检索运行的查询总数或查询缓存的命中率？