DP-300 Practice Question: Monitor, configure, and optimize database resources
Your Azure SQL Database is experiencing a sudden increase in wait time due to PAGEIOLATCH_SH waits. What should you do to reduce these waits?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add appropriate indexes to reduce table scans
PAGEIOLATCH_SH waits indicate I/O bottlenecks caused by excessive page reads from disk. Adding appropriate indexes reduces the number of pages read by enabling more efficient data access (e.g., index seeks instead of table scans), directly reducing I/O. Option A is incorrect because increasing max memory does not address the underlying query inefficiency driving I/O. Option C is incorrect because page compression reduces storage but may increase CPU and does not primarily reduce I/O waits. Option D is incorrect because forcing parameterization improves plan reuse but does not target I/O reduction.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the database max memory
Why it's wrong here
Increasing memory may help cache more data but does not address the root cause of excessive I/O.
- ✓
Add appropriate indexes to reduce table scans
Why this is correct
Adding indexes reduces the number of pages read, directly reducing PAGEIOLATCH_SH waits.
- ✗
Enable page compression on large tables
Why it's wrong here
Page compression reduces storage but may increase CPU; it may not reduce I/O waits significantly.
- ✗
Force parameterization of queries
Why it's wrong here
Forced parameterization helps with plan reuse but does not reduce I/O waits.
Go deeper
Related to this question
Learn chapter
Overview of Azure Data Platform Options
Key term
Azure SQL Performance Tuning
Azure SQL Performance Tuning is the process of optimizing the speed and efficiency of queries and database operations in Microsoft Azure SQL Database or SQL Managed Instance to reduce latency and improve throughput.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DP-300 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DP-300 exam.