與IO相關的等待事件troubleshooting-系列2

來源:互聯網
上載者:User

Troubleshooting與IO相關的等待:

判斷IO等待事件的真實重要性:

        接下來的兩個真實案例說明了為什麼需要查看“Wait Time”和"Service Time"兩部分,對分析資料庫效能的重要性。

   db file scattered read                              6,105        6,264   30.09direct path write                                   1,992        3,268   15.70control file parallel write                           893          198     .95db file parallel write                                 40          131     .63         -------------------------------------------------------------   

        130.5     12,372.6   



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