DP-300 Practice Question: Monitor, configure, and optimize database resources
Which TWO configurations can help improve the performance of an Azure SQL Database experiencing high `WRITELOG` waits?
⚠ Common exam trap
Many exam-takers confuse WRITELOG waits with general I/O bottlenecks and select backup frequency or TDE, not realizing that only reducing log write volume (via in-memory OLTP) or increasing log write speed (via higher service tier) directly resolves the wait type.
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
✓
Use in-memory OLTP to reduce log writes.
High WRITELOG waits indicate that the transaction log is a bottleneck, often due to excessive log I/O. In-memory OLTP reduces log writes by logging only the delta changes for memory-optimized tables, rather than full row versions, which directly alleviates log pressure. This makes option B correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable Transparent Data Encryption (TDE).
Why it's wrong here
TDE increases log writes due to encryption.
- ✓
Use in-memory OLTP to reduce log writes.
Why this is correct
In-memory OLTP reduces log generation.
- ✓
Increase the service tier to a higher performance level.
Why this is correct
Higher tiers have higher log write throughput.
- ✗
Enable Query Store.
Why it's wrong here
Query Store writes to the database, increasing log I/O.
- ✗
Increase the frequency of database backups.
Why it's wrong here
More backups increase log activity.
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.