The correct answer is that `summariesonly=t` restricts tstats to only use data from accelerated data model summaries. This is why the search returns quickly but shows zero events for some `src` values—those values are simply not present in the accelerated summaries, so they are excluded from the results. On the Splunk Core Certified Power User SPLK-1003 exam, this question tests your understanding of how `tstats` interacts with data model acceleration, a key performance optimization concept. A common trap is assuming `summariesonly=t` filters events by time or index, when in reality it bypasses raw data entirely, meaning any source not covered by the summary will show zero results. Remember the memory tip: “Summaries only = summary data only; if it’s not in the summary, it’s not in the result.”
SPLK-1003 Advanced Searching and Statistics Practice Question
This SPLK-1003 practice question tests your understanding of advanced searching and statistics. 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.
Exhibit
Refer to the exhibit.
```
| tstats summariesonly=t count from datamodel=Authentication.Authentication where Authentication.action=failure by Authentication.src
```
Refer to the exhibit. The search returns results quickly but shows zero events for some src values. What does `summariesonly=t` imply?
Refer to the exhibit.
```
| tstats summariesonly=t count from datamodel=Authentication.Authentication where Authentication.action=failure by Authentication.src
```
A
It restricts tstats to only use data from accelerated data model summaries.
This is the purpose of summariesonly=t; if acceleration is not complete, some data may be missing.
B
It causes tstats to search the index directly.
Why wrong: tstats always searches data model acceleration; summariesonly=t restricts to summaries only.
C
It makes the search run faster but less accurate.
Why wrong: It is accurate for accelerated data, but data outside acceleration is ignored.
D
It forces tstats to return all events, including those not in summaries.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It restricts tstats to only use data from accelerated data model summaries.
Option A is correct because `summariesonly=t` in a `tstats` command restricts the search to only use data from accelerated data model summaries, ignoring raw event data. This is why the search returns quickly but shows zero events for some `src` values—those values are not present in the accelerated summaries, so they are excluded from the results.
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.
✓
It restricts tstats to only use data from accelerated data model summaries.
Why this is correct
This is the purpose of summariesonly=t; if acceleration is not complete, some data may be missing.
Related concept
Read the scenario before looking for a memorised answer.
✗
It causes tstats to search the index directly.
Why it's wrong here
tstats always searches data model acceleration; summariesonly=t restricts to summaries only.
✗
It makes the search run faster but less accurate.
Why it's wrong here
It is accurate for accelerated data, but data outside acceleration is ignored.
✗
It forces tstats to return all events, including those not in summaries.
Why it's wrong here
summariesonly=t excludes non-accelerated data.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Splunk often tests the misconception that `summariesonly=t` makes searches 'faster but less accurate,' when in reality it strictly limits the data source to summaries, and accuracy depends on summary completeness, not the option itself.
Detailed technical explanation
How to think about this question
Under the hood, `tstats` uses TSIDX (time-series index) files for accelerated data models, which are pre-aggregated and stored separately from raw data. When `summariesonly=t` is set, `tstats` queries only these TSIDX files, bypassing the raw index entirely. A subtle behavior is that if the acceleration is incomplete or has gaps (e.g., due to time range or data model constraints), `tstats` will return zero results for values not in the summaries, which can mislead users into thinking data is missing when it is only unaccelerated.
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.
TExam Day Tips
→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-1003 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Advanced Searching and Statistics — This question tests Advanced Searching and Statistics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: It restricts tstats to only use data from accelerated data model summaries. — Option A is correct because `summariesonly=t` in a `tstats` command restricts the search to only use data from accelerated data model summaries, ignoring raw event data. This is why the search returns quickly but shows zero events for some `src` values—those values are not present in the accelerated summaries, so they are excluded from the results.
What should I do if I get this SPLK-1003 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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