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Your organization is currently updating an existing corporate application that is running in another public cloud to access managed database services in Google Cloud. The application will remain in the other public cloud while the database is migrated to Google Cloud. You want to follow Google-recommended practices for authentication. You need to minimize user disruption during the migration. What should you do?
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Question 19 - Professional Cloud Database Engineer discussion

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Your customer has a global chat application that uses a multi-regional Cloud Spanner instance. The application has recently experienced degraded performance after a new version of the application was launched. Your customer asked you for assistance. During initial troubleshooting, you observed high read latency. What should you do?

A.
Use query parameters to speed up frequently executed queries.
Answers
A.
Use query parameters to speed up frequently executed queries.
B.
Change the Cloud Spanner configuration from multi-region to single region.
Answers
B.
Change the Cloud Spanner configuration from multi-region to single region.
C.
Use SQL statements to analyze SPANNER_SYS.READ_STATS* tables.
Answers
C.
Use SQL statements to analyze SPANNER_SYS.READ_STATS* tables.
D.
Use SQL statements to analyze SPANNER_SYS.QUERY_STATS* tables.
Answers
D.
Use SQL statements to analyze SPANNER_SYS.QUERY_STATS* tables.
Suggested answer: C

Explanation:

To troubleshoot high read latency, you can use SQL statements to analyze the SPANNER_SYS.READ_STATS* tables. These tables contain statistics about read operations in Cloud Spanner, including the number of reads, read latency, and the number of read errors. By analyzing these tables, you can identify the cause of the high read latency and take appropriate action to resolve the issue. Other options, such as using query parameters to speed up frequently executed queries or changing the Cloud Spanner configuration from multi-region to single region, may not be directly related to the issue of high read latency. Similarly, analyzing the SPANNER_SYS.QUERY_STATS* tables, which contain statistics about query operations, may not be relevant to the issue of high read latency.

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asked 18/09/2024
Justin Schowalter
34 questions
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