- A
Upgrade the search head to a larger instance with more CPU cores and memory.
Why wrong: A larger search head might temporarily improve performance but does not address the underlying issue of scanning massive raw data. It is a costly fix without resolving the root cause.
- B
Increase the number of indexers to 8 to distribute the search load more evenly.
Why wrong: Adding indexers can help with indexing and search distribution, but the bottleneck here is the search head CPU, not indexer capacity. More indexers may not significantly reduce search head load for wide time-range searches.
- C
Enable summary indexing and use the tstats command for searches over large time ranges.
Summary indexing pre-calculates statistics (e.g., counts, sums) and stores them in tsidx files, allowing tstats to retrieve results quickly without scanning raw data. This greatly reduces search head CPU and query time.
- D
Reduce the data retention period on the indexers from 90 days to 30 days.
Why wrong: Reducing retention would lose older data and might reduce the data volume for 'All time' searches, but it is not a best practice for performance optimization and could violate compliance requirements.
Quick Answer
The answer is enabling summary indexing and using the tstats command for searches over large time ranges. This is the most effective course of action because summary indexing pre-aggregates raw log data into smaller, time-based data structures, allowing tstats to query these summaries instead of scanning the full 50 GB per day of raw data across all indexers. This directly reduces the load on the search head and cuts search times for 'All time' queries, as the high CPU usage you observed is caused by processing massive volumes of raw events. On the Splunk SPLK-1002 exam, this scenario tests your understanding of optimizing search performance through data summarization, a key concept for the Core Certified User. A common trap is choosing to add more indexers or increase hardware, which doesn't address the root cause of scanning all raw data. Remember the memory tip: "tstats on summaries, not raw stats on all"—if you're searching 'All time', summarize first.
SPLK-1002 Splunk Basics and Interface Navigation Practice Question
This SPLK-1002 practice question tests your understanding of splunk basics and interface navigation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A company has a distributed Splunk environment with a single search head and 4 indexers. The data volume is approximately 50 GB per day across various sourcetypes. Users frequently run searches that span 'All time' (from the time picker), and these searches are taking significantly longer than expected. The search head shows high CPU usage during these searches, while indexers are moderately loaded. The administrator has verified that all indexers are healthy and that there are no network bottlenecks. The data is raw log data with minimal field extractions. Which course of action will most effectively improve search performance for these 'All time' searches?
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
Enable summary indexing and use the tstats command for searches over large time ranges.
Summary indexing with tstats allows pre-aggregating data over time, drastically reducing the amount of data scanned for historical searches. This addresses the root cause of scanning large volumes of raw data. Other options either do not directly address the performance issue or would have negative side effects.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Upgrade the search head to a larger instance with more CPU cores and memory.
Why it's wrong here
A larger search head might temporarily improve performance but does not address the underlying issue of scanning massive raw data. It is a costly fix without resolving the root cause.
- ✗
Increase the number of indexers to 8 to distribute the search load more evenly.
Why it's wrong here
Adding indexers can help with indexing and search distribution, but the bottleneck here is the search head CPU, not indexer capacity. More indexers may not significantly reduce search head load for wide time-range searches.
- ✓
Enable summary indexing and use the tstats command for searches over large time ranges.
Why this is correct
Summary indexing pre-calculates statistics (e.g., counts, sums) and stores them in tsidx files, allowing tstats to retrieve results quickly without scanning raw data. This greatly reduces search head CPU and query time.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Reduce the data retention period on the indexers from 90 days to 30 days.
Why it's wrong here
Reducing retention would lose older data and might reduce the data volume for 'All time' searches, but it is not a best practice for performance optimization and could violate compliance requirements.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the SPLK-1002 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
Got this wrong? Here's your next step.
Identify which SPLK-1002 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Splunk Basics and Interface Navigation — study guide chapter
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Splunk Basics and Interface Navigation practice questions
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FAQ
Questions learners often ask
What does this SPLK-1002 question test?
Splunk Basics and Interface Navigation — This question tests Splunk Basics and Interface Navigation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable summary indexing and use the tstats command for searches over large time ranges. — Summary indexing with tstats allows pre-aggregating data over time, drastically reducing the amount of data scanned for historical searches. This addresses the root cause of scanning large volumes of raw data. Other options either do not directly address the performance issue or would have negative side effects.
What should I do if I get this SPLK-1002 question wrong?
Identify which SPLK-1002 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 24, 2026
This SPLK-1002 practice question is part of Courseiva's free Splunk 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 SPLK-1002 exam.
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