與IO相關的等待事件troubleshooting-系列6

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上載者:User

        當Oracle從多個資料檔案並行讀到記憶體(PGA或Buffer Cache)的非連續緩衝時,可以看到這種等待事件。在恢複操作或為了最佳化而預先處理緩衝(代替執行多個單塊讀)時也會有這種等待事件。

Direct Path Reads and Writes

'direct path read'

'direct path write'

'direct path read (lob)'

'direct path write (lob)'


”節中列表的相對位置來評估他們的真實影響。

)。預設值是1Mb,但是如果系統的



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