Splunk® Enterprise

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The sistats command is one of several commands that you can use to create summary indexes. Summary indexing is one of the methods that you can use to speed up searches that take a long time to run.

The sistats command is the summary indexing version of the stats command, which calculates aggregate statistics over the dataset.

The sistats command populates a summary index. You must then create a report to generate the summary statistics. See the Usage section.


sistats [allnum=<bool>] [delim=<string>] ( <stats-agg-term> | <sparkline-agg-term> ) [<by clause>]

  • For descriptions of each of the arguments in this syntax, refer to the stats command.
  • For information about functions that you can use with the sistats command, see statistical and charting functions.


The summary indexes exist separately from your main indexes.

After you create the summary index, create a report by running a search against the summary index. You use the exact same search string that you used to populate the summary index, substituting the stats command for the sistats command, to create your reports.

For more information, see About report accelleration and summary indexing and Use summary indexing for increased reporting efficiency in the Knowledge Manager Manual.

Memory and maximum results

In the limits.conf file, the maxresultrows setting in the [searchresults] stanza specifies the maximum number of results to return. The default value is 50,000. Increasing this limit can result in more memory usage.

The max_mem_usage_mb setting in the [default] stanza is used to limit how much memory the sistats command uses to keep track of information. If the sistats command reaches this limit, the command stops adding the requested fields to the search results. You can increase the limit, contingent on the available system memory.

If you are using Splunk Cloud and want to change either of these limits, file a Support ticket.


Example 1:

Create a summary index with the statistics about the average, for each hour, of any unique field that ends with the string "lay". For example, delay, xdelay, relay, etc.

... | sistats avg(*lay) BY date_hour

To create a report, run a search against the summary index using this search

index=summary | stats avg(*lay) BY date_hour

See also

collect, overlap, sichart, sirare, sitop, sitimechart

For a detailed explanation and examples of summary indexing, see Use summary indexing for increased reporting efficiency in the Knowledge Manager Manual.


Have questions? Visit Splunk Answers and see what questions and answers the Splunk community has using the sistats command.


This documentation applies to the following versions of Splunk® Enterprise: 4.3, 4.3.1, 4.3.2, 4.3.3, 4.3.4, 4.3.5, 4.3.6, 4.3.7, 5.0, 5.0.1, 5.0.2, 5.0.3, 5.0.4, 5.0.5, 5.0.6, 5.0.7, 5.0.8, 5.0.9, 5.0.10, 5.0.11, 5.0.12, 5.0.13, 5.0.14, 5.0.15, 5.0.16, 5.0.17, 5.0.18, 6.0, 6.0.1, 6.0.2, 6.0.3, 6.0.4, 6.0.5, 6.0.6, 6.0.7, 6.0.8, 6.0.9, 6.0.10, 6.0.11, 6.0.12, 6.0.13, 6.0.14, 6.1, 6.1.1, 6.1.2, 6.1.3, 6.1.4, 6.1.5, 6.1.6, 6.1.7, 6.1.8, 6.1.9, 6.1.10, 6.1.11, 6.1.12, 6.1.13, 6.2.0, 6.2.1, 6.2.2, 6.2.3, 6.2.4, 6.2.5, 6.2.6, 6.2.7, 6.2.8, 6.2.9, 6.2.10, 6.2.11, 6.2.12, 6.2.13, 6.3.0, 6.3.1, 6.3.2, 6.3.3, 6.3.4, 6.3.5, 6.3.6, 6.3.7, 6.3.8, 6.3.9, 6.3.10, 6.3.11, 6.3.12, 6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4, 6.4.5, 6.4.6, 6.4.7, 6.4.8, 6.4.9, 6.5.0, 6.5.1, 6.5.1612 (Splunk Cloud only), 6.5.2, 6.5.3, 6.5.4, 6.5.5, 6.5.6, 6.6.0, 6.6.1, 6.6.2, 6.6.3, 6.6.4, 7.0.0, 7.0.1

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