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Oracle

1Z0-064 · Question #74

Users complain about increased response time for queries in your production database that supports an OLTP workload. On investigation, you notice a large number of db file scattered read, latch…

The correct answer is B. repeated simultaneous access to a block or small number of blocks D. queries not using indexes and performing full table scans E. queries repeatedly fetching blocks that are not in the database buffer cache. See the full explanation below for the reasoning.

Question

Users complain about increased response time for queries in your production database that supports an OLTP workload. On investigation, you notice a large number of db file scattered read, latch: cache buffers lru chain, and latch: cache buffers chains wait events:

Identify three possible reasons for the increased response time. (Choose three.)

Options

  • Atoo many sort operations being performed
  • Brepeated simultaneous access to a block or small number of blocks
  • Cthe shared pool is inadequately sized
  • Dqueries not using indexes and performing full table scans
  • Equeries repeatedly fetching blocks that are not in the database buffer cache
  • Fcursors are closed explicitly after each execution

How the community answered

(42 responses)
  • A
    7% (3)
  • B
    76% (32)
  • C
    12% (5)
  • F
    5% (2)

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