--- title: "Generate Summary Results" description: "Configure the JMeter Generate Summary Results listeners: properties, defaults, and practical usage notes for building reliable load tests." url: https://docs.jmeter.ai/components/generate-summary-results/ lastUpdated: 2026-10-01 source: docs.jmeter.ai --- # Generate Summary Results *Part of the **Listeners** category. Also documented in context in the [full Component Reference](/user-manual/component-reference/#generate-summary-results).* ![Generate Summary Results](/images/screenshots/summary.png) This test element can be placed anywhere in the test plan. Generates a summary of the test run so far to the log file and/or standard output. Both running and differential totals are shown. Output is generated every `n` seconds (default 30 seconds) on the appropriate time boundary, so that multiple test runs on the same time will be synchronised. > **Note** > Since a summary/differential line is written only if there are samples emitted, the interval > for generation may not be respected if your test has no sample generated within the interval See `jmeter.properties` file for the summariser configuration items: ```properties # Define the following property to automatically start a summariser with that name # (applies to CLI mode only) #summariser.name=summary # # interval between summaries (in seconds) default 3 minutes #summariser.interval=30 # # Write messages to log file #summariser.log=true # # Write messages to System.out #summariser.out=true ``` This element is mainly intended for batch (CLI) runs. The output looks like the following: ```plaintext label + 16 in 0:00:12 = 1.3/s Avg: 1608 Min: 1163 Max: 2009 Err: 0 (0.00%) Active: 5 Started: 5 Finished: 0 label + 82 in 0:00:30 = 2.7/s Avg: 1518 Min: 1003 Max: 2020 Err: 0 (0.00%) Active: 5 Started: 5 Finished: 0 label = 98 in 0:00:42 = 2.3/s Avg: 1533 Min: 1003 Max: 2020 Err: 0 (0.00%) label + 85 in 0:00:30 = 2.8/s Avg: 1505 Min: 1008 Max: 2005 Err: 0 (0.00%) Active: 5 Started: 5 Finished: 0 label = 183 in 0:01:13 = 2.5/s Avg: 1520 Min: 1003 Max: 2020 Err: 0 (0.00%) label + 79 in 0:00:30 = 2.7/s Avg: 1578 Min: 1089 Max: 2012 Err: 0 (0.00%) Active: 5 Started: 5 Finished: 0 label = 262 in 0:01:43 = 2.6/s Avg: 1538 Min: 1003 Max: 2020 Err: 0 (0.00%) label + 80 in 0:00:30 = 2.7/s Avg: 1531 Min: 1013 Max: 2014 Err: 0 (0.00%) Active: 5 Started: 5 Finished: 0 label = 342 in 0:02:12 = 2.6/s Avg: 1536 Min: 1003 Max: 2020 Err: 0 (0.00%) label + 83 in 0:00:31 = 2.7/s Avg: 1512 Min: 1003 Max: 1982 Err: 0 (0.00%) Active: 5 Started: 5 Finished: 0 label = 425 in 0:02:43 = 2.6/s Avg: 1531 Min: 1003 Max: 2020 Err: 0 (0.00%) label + 83 in 0:00:29 = 2.8/s Avg: 1487 Min: 1023 Max: 2013 Err: 0 (0.00%) Active: 5 Started: 5 Finished: 0 label = 508 in 0:03:12 = 2.6/s Avg: 1524 Min: 1003 Max: 2020 Err: 0 (0.00%) label + 78 in 0:00:30 = 2.6/s Avg: 1594 Min: 1013 Max: 2016 Err: 0 (0.00%) Active: 5 Started: 5 Finished: 0 label = 586 in 0:03:43 = 2.6/s Avg: 1533 Min: 1003 Max: 2020 Err: 0 (0.00%) label + 80 in 0:00:30 = 2.7/s Avg: 1516 Min: 1013 Max: 2005 Err: 0 (0.00%) Active: 5 Started: 5 Finished: 0 label = 666 in 0:04:12 = 2.6/s Avg: 1531 Min: 1003 Max: 2020 Err: 0 (0.00%) label + 86 in 0:00:30 = 2.9/s Avg: 1449 Min: 1004 Max: 2017 Err: 0 (0.00%) Active: 5 Started: 5 Finished: 0 label = 752 in 0:04:43 = 2.7/s Avg: 1522 Min: 1003 Max: 2020 Err: 0 (0.00%) label + 65 in 0:00:24 = 2.7/s Avg: 1579 Min: 1007 Max: 2003 Err: 0 (0.00%) Active: 0 Started: 5 Finished: 5 label = 817 in 0:05:07 = 2.7/s Avg: 1526 Min: 1003 Max: 2020 Err: 0 (0.00%) ``` The “`label`” is the name of the element. The `"+"` means that the line is a delta line, i.e. shows the changes since the last output. The `"="` means that the line is a total line, i.e. it shows the running total. Entries in the JMeter log file also include time-stamps. The example “`817 in 0:05:07 = 2.7/s`” means that there were 817 samples recorded in 5 minutes and 7 seconds, and that works out at 2.7 samples per second. The `Avg` (Average), `Min` (Minimum) and `Max` (Maximum) times are in milliseconds. “`Err`” means number of errors (also shown as percentage). The last two lines will appear at the end of a test. They will not be synchronised to the appropriate time boundary. Note that the initial and final deltas may be for less than the interval (in the example above this is 30 seconds). The first delta will generally be lower, as JMeter synchronizes to the interval boundary. The last delta will be lower, as the test will generally not finish on an exact interval boundary. The label is used to group sample results together. So if you have multiple Thread Groups and want to summarize across them all, then use the same label - or add the summariser to the Test Plan (so all thread groups are in scope). Different summary groupings can be implemented by using suitable labels and adding the summarisers to appropriate parts of the test plan. > **Note** > In CLI mode by default a Generate Summary Results listener named “`summariser`” is configured, if you have already added one to your Test Plan, ensure you name it differently > otherwise results will be accumulated under this label (summary) leading to wrong results (sum of total samples + samples located under the Parent of Generate Summary Results listener). > > This is not a bug but a design choice allowing to summarize across thread groups. | Name | Required | Description | | --- | --- | --- | | Name | Yes | Descriptive name for this element that is shown in the tree. It appears as the “`label`” in the output. Details for all elements with the same label will be added together. | ## Related - [Grafana / InfluxDB / Backend Listener](/topics/grafana-influx-backend-listener/) - [Coordinated Omission Calculator](/tools/coordinated-omission/) - [Full Component Reference](/user-manual/component-reference/) - [Functions and Variables](/user-manual/functions/)