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Exam 1z0-084 topic 1 question 29 discussion

Actual exam question from Oracle's 1z0-084
Question #: 29
Topic #: 1
[All 1z0-084 Questions]

A database supporting a mixed workload is hosted on a server with 64 CPUs.
A large number of free buffer waits and buffer busy waits occur affecting performance.
The buffer cache size was then increased but after a few hours, the same wait events occur more often than before the change.

Which two actions can help reduce the number of these waits? (Choose two.)

  • A. increasing the value of DB_FILE_MULTIBLOCK_READ_COUNT to 128
  • B. increasing the size of MEMORY_TARGET
  • C. setting dbwr_io_slaves to 64
  • D. increasing the value of DB_WRITER_PROCESSES to 64
  • E. reducing the value of DB_FILE_MULTIBLOCK_READ_COUNT to 64
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Suggested Answer: AD 🗳️

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krwi1
2 weeks, 2 days ago
Selected Answer: DE
I am not sure - it can be D,E (increase db writer and decrease multiblock read) or maybe B, D (bigger memory target = more logical reads->less physical reads-> less buffer waits)
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