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Question 143 - DP-300 discussion

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You manage an enterprise data warehouse in Azure Synapse Analytics.

Users report slow performance when they run commonly used queries. Users do not report performance changes for infrequently used queries. You need to monitor resource utilization to determine the source of the performance issues.

Which metric should you monitor?

A.
Local tempdb percentage
Answers
A.
Local tempdb percentage
B.
DWU percentage
Answers
B.
DWU percentage
C.
Data Warehouse Units (DWU) used
Answers
C.
Data Warehouse Units (DWU) used
D.
Cache hit percentage
Answers
D.
Cache hit percentage
Suggested answer: A

Explanation:

Tempdb is used to hold intermediate results during query execution. High utilization of the tempdb database can lead to slow query performance. Note: If you have a query that is consuming a large amount of memory or have received an error message related to allocation of tempdb, it could be due to a very large CREATE TABLE AS SELECT (CTAS) or INSERT SELECT statement running that is failing in the final data movement operation.

Reference:

https://docs.microsoft.com/en-us/azure/synapse-analytics/sql-data-warehouse/sql-data-warehouse-manage-monitor#monitor-tempdb

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asked 02/10/2024
Samy Mameri
28 questions
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