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Exam DP-300 topic 4 question 4 discussion

Actual exam question from Microsoft's DP-300
Question #: 4
Topic #: 4
[All DP-300 Questions]

You have an Azure SQL database.
You discover that the plan cache is full of compiled plans that were used only once.
You run the select * from sys.database_scoped_configurations Transact-SQL command and receive the results shown in the following table.

You need relieve the memory pressure.
What should you configure?

  • A. LEGACY_CARDINALITY_ESTIMATION
  • B. QUERY_OPTIMIZER_HOTFIXES
  • C. OPTIMIZE_FOR_AD_HOC_WORKLOADS
  • D. ACCELERATED_PLAN_FORCING
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Suggested Answer: C 🗳️
by klever at Feb. 27, 2021, 9:54 a.m.

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klever
Highly Voted 3 years, 2 months ago
Option C is correct The optimize for ad hoc workloads option is used to improve the efficiency of the plan cache for workloads that contain many single use ad hoc batches. When this option is set to 1, the Database Engine stores a small compiled plan stub in the plan cache when a batch is compiled for the first time, instead of the full compiled plan. This helps to relieve memory pressure by not allowing the plan cache to become filled with compiled plans that are not reused. Article: https://docs.microsoft.com/en-us/sql/database-engine/configure-windows/optimize-for-ad-hoc-workloads-server-configuration-option?view=sql-server-ver15
upvoted 10 times
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testdumps2017
Most Recent 9 months, 1 week ago
for the exam, option C is correct. for real life, not really:https://erikdarlingdata.com/no-really-dont-optimize-for-ad-hoc-workloads-as-a-best-practice/
upvoted 4 times
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Pranava_GCP
1 year ago
Selected Answer: C
C is correct, C. OPTIMIZE_FOR_AD_HOC_WORKLOADS When this option is set to 1, the Database Engine stores a small compiled plan stub in the plan cache when a batch is compiled for the first time, instead of the full compiled plan. This may help to relieve memory pressure by not allowing the plan cache to become filled with compiled plans that aren't reused.
upvoted 3 times
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