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Question 262 - DBS-C01 discussion

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A manufacturing company has an. inventory system that stores information in an Amazon Aurora MySQL DB cluster. The database tables are partitioned. The database size has grown to 3 TB. Users run one-time queries by using a SQL client. Queries that use an equijoin to join large tables are taking a long time to run.

Which action will improve query performance with the LEAST operational effort?

A.
Migrate the database to a new Amazon Redshift data warehouse.
Answers
A.
Migrate the database to a new Amazon Redshift data warehouse.
B.
Enable hash joins on the database by setting the variable optimizer_switch to hash_join=on.
Answers
B.
Enable hash joins on the database by setting the variable optimizer_switch to hash_join=on.
C.
Take a snapshot of the DB cluster. Create a new DB instance by using the snapshot, and enable parallel query mode.
Answers
C.
Take a snapshot of the DB cluster. Create a new DB instance by using the snapshot, and enable parallel query mode.
D.
Add an Aurora read replica.
Answers
D.
Add an Aurora read replica.
Suggested answer: B

Explanation:


https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.BestPractices.html

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asked 16/09/2024
Francesco Gallo
33 questions
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