When the statement is compiled, its access plan is stored in the package cache.

在编译语句时，语句的访问计划被存储在包缓存中。

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If the same INSERT statement is executed repeatedly, its access plan will (usually) be found in the package cache and the compilation cost is avoided.

如果重复地执行相同的insert语句，则该语句的访问计划(通常)会进入到包缓存中，这样就免除了编译的开销。

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It can also capture queries from SQL cache and produce the explain plan.

它还可以从SQL缓存捕获查询并生成解释计划。

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While flash memory in a separate smaller capacity SSD module is playing a role in these new ultra-thin computers the introduction of hybrid hard disk drives with a flash cache inside the hard drive may plan a significant role as well.

FORBES: Digital Storage Needs the Right Stuff