# tFlowMeter

Counts the number of rows processed in the defined flow, so this number can be caught by the tFlowMeterCatcher component for logging purposes.

## tFlowMeter Standard properties

These properties are used to configure tFlowMeter running in the Standard Job framework.

The Standard tFlowMeter component belongs to the Logs & Errors family.

The component in this framework is available in all Talend products.

## Basic settings

| Properties | Description |
| --- | --- |
| Use input connection name as label | Select this check box to reuse the name given to the input main<br>row flow as label in the logged data. |
| Mode | Select the type of values for the data measured: Absolute: the actual number of rows is<br>logged<br><br><br>Relative: a ratio (%) of the number<br>of rows is logged. When this option is selected, a Connections List shows to let you select<br>a reference connection. |
| Thresholds | Adds a threshold to watch proportions in volumes measured. you can<br>decide that the normal flow has to be between low and top end of a<br>row number range, and if the flow is under this low end, there is a<br>bottleneck. |

## Global Variables

| Variables | Description |
| --- | --- |
| Global Variables | ERROR\_MESSAGE: the error message generated by the<br>component when an error occurs. This is an After variable and it returns a string. This<br>variable functions only if the Die on error checkbox is<br>cleared, if the component has this checkbox.<br><br>A Flow variable functions during the execution of a component<br>while an After variable functions after the execution of the component.<br><br>To fill up a field or expression with a variable, press Ctrl+Space to access the variable list and choose the variable to use from<br>it.<br><br>For more information about variables, see [Using contexts and variables](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/contexts-and-variables). |

## Usage

| Usage guidance | Description |
| --- | --- |
| **Usage rule** | Cannot be used as a start component as it requires an input flow<br>to operate. |

If you have a need of log, statistics and other measurement of your data flows, see [Measuring data flows](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/measuring-data-flows).

**Related concepts**

* [Catching flow metrics from a Job](https://help.qlik.com/talend/en-US/components/8.0/logs-and-errors/tflowmeter-tflowmetercatcher-tmysqlinput-catching-flow-metrics-from-job-standard-component-the)