db file parallel read官网解释: This happens during recovery. It can also happen duri
db file parallel read
官网解释:
This happens during recovery. It can also happen during buffer prefetching, as an optimization (rather than perfORMing multiple single-block reads). Database blocks that need to be changed as part of recovery are read in parallel from the database.
Wait Time: Wait until all of the I/Os are completed
解释:
db file parallel read 这在恢复期间发生。 它也可能在缓冲区预取期间发生,作为优化(而不是执行多个单块读取)。 从数据库并行读取需要作为恢复一部分进行更改的数据库块。
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本文标题: Oracle 等待事件之 db file parallel read
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