This EX200 practice question tests your understanding of deploy, configure, and maintain systems. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An administrator wants to optimize system performance for a database workload. Which tool should be used to select a performance profile?
performance-tune --profile database
Why wrong: performance-tune is not a standard command.
setroubleshoot
Why wrong: setroubleshoot is used for SELinux troubleshooting, not performance tuning.
tuned-adm profile throughput-performance
tuned-adm selects and applies a performance profile.
systemctl set-profile database
Why wrong: systemctl does not have a set-profile command.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
tuned-adm profile throughput-performance
C is correct because `tuned-adm profile throughput-performance` selects a Tuned performance profile optimized for high throughput, which is suitable for database workloads that benefit from increased I/O and network performance. Tuned is the systemd-based dynamic system tuning daemon in RHEL that adjusts kernel parameters, disk schedulers, and other settings based on the selected profile.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
performance-tune --profile database
Why it's wrong here
performance-tune is not a standard command.
setroubleshoot
Why it's wrong here
setroubleshoot is used for SELinux troubleshooting, not performance tuning.
tuned-adm profile throughput-performance
Why this is correct
tuned-adm selects and applies a performance profile.
Related concept
Read the scenario before looking for a memorised answer.
systemctl set-profile database
Why it's wrong here
systemctl does not have a set-profile command.
Common exam traps
The trap here is that candidates may confuse `tuned-adm` with non-existent commands like `performance-tune` or incorrectly assume `systemctl` can manage performance profiles, when in fact Tuned is a separate service controlled via `tuned-adm`.
Trap categories for this question
Command / output trap
performance-tune is not a standard command.
Detailed technical explanation
Tuned uses profiles stored in `/usr/lib/tuned/` and `/etc/tuned/`, each containing a `tuned.conf` file that defines sysctl settings, kernel boot parameters, and device-level tunings (e.g., elevator, readahead). The `throughput-performance` profile, for example, sets `kernel.sched_min_granularity_ns` to 10 ms and `vm.dirty_ratio` to 40%, which can improve database write performance but may increase latency for interactive workloads.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the EX200 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Deploy, configure, and maintain systems — This question tests Deploy, configure, and maintain systems — Read the scenario before looking for a memorised answer..
The correct answer is: tuned-adm profile throughput-performance — C is correct because `tuned-adm profile throughput-performance` selects a Tuned performance profile optimized for high throughput, which is suitable for database workloads that benefit from increased I/O and network performance. Tuned is the systemd-based dynamic system tuning daemon in RHEL that adjusts kernel parameters, disk schedulers, and other settings based on the selected profile.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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