DP-300 Question #161: Real Exam Question with Answer & Explanation

Question

Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution. After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen. You have SQL Server 2019 on an Azure virtual machine. You are troubleshooting performance issues for a query in a SQL Server instance. To gather more information, you query sys.dm_exec_requests and discover that the wait type is PAGELATCH_UP and the wait_resource is 2:3:905856. You need to improve system performance. Solution: You create additional tempdb files. Does this meet the goal?

Options

• AYes
• BNo

Explanation

To improve the concurrency of tempdb, try the following methods: * Increase the number of data files in tempdb to maximize disk bandwidth and reduce contention in allocation structures. Note: Symptoms On a server that is running Microsoft SQL Server, you notice severe blocking when the server is experiencing a heavy load. Dynamic Management Views [sys.dm_exec_request or sys.dm_os_waiting_tasks] indicates that these requests or tasks are waiting for tempdb resources. Additionally, the wait type is PAGELATCH_UP, and the wait resource points to pages in Tempdb. https://docs.microsoft.com/en-US/troubleshoot/sql/performance/recommendations-reduce- allocation-contention

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