多选题

In your production database， you observe that users’ transactions are consuming a lot of resources and you plan to impose resource restrictions by using Resource Manager. For which three resources can you enable usage restrictions by using Resource Manager？（）

ACPU usage

Bdegree of parallelism

Cnumber of open cursors

Dnumber of sorts performed

Eidle time for blocking sessions

Fnumber of disk I/O operations performed

Gnumber of memory I/O operations performed

略

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