ISAM used the same basic architecture - separating data and indices with automatic updates of the indices when data was changed.

ISAM用的是同样的基本架构——分离数据和索引，同时在数据发生变化时自动更新索引。

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While the amount of logical ISAM instructions we have performed is at 6 million reads, the number of lock requests (which is a physical indicator of what was read) is at 59 billion.

而我们执行的逻辑ISAM指令的数量是6百万次读取，锁请求数是(就是所读取的物理指示器)是590亿。

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