Question

------------------provides a general purpose record I/O capability and maintains basic data about files

Answer 1

Question:

_________provides a general purpose record I/O capability and maintains basic data about files.

Answer: Logical I/O

Logical I/O provides a general purpose record I/O capability and maintains basic data about files.

Additional Info:-

Logical I/O:

• It is the data block accessed from Buffer Cache

• Its statistics in captured in db block get, consistents gets, bufer is pinned count, session logical read

• LIO may have incurred a PIO in order to get into the cache in the first place.

• Db block gets is the state of the block as it exists consistents gets is the blocks read from the buffer cache in a consistent state.

• This stats is clearly visible as db block gets and consistent gets in Autotrace executed.

• We can find this for statement from cr+cu in raw trace data

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