# Options

Errors, warnings, and other information generated as the job runs are stored in logs. You can specify how much information is in a log and whether the log is cleared each time through the **Options** section of this window. You can also enable safe mode and specify whether PDI should gather performance metrics. [Logging and Performance Monitoring](https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/data-integration-perspective-in-the-pdi-client/logging-and-performance-monitoring) describes the logging methods available in PDI.

| Option                         | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| ------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Clear log before running**   | Indicates whether to clear all your logs before you run your job. If your log is large, you might need to clear it before the next execution to conserve space.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| **Log level**                  | <p>Specifies how much logging is performed and the amount of information captured: - <strong>Nothing</strong>: No logging occurs</p><ul><li><strong>Error</strong>: Only errors are logged</li><li><strong>Minimal</strong>: Only use minimal logging</li><li><strong>Basic</strong>: This is the default level</li><li><strong>Detailed</strong>: Give detailed logging output</li><li><strong>Debug</strong>: For debugging purposes, very detailed output</li><li><strong>Row Level</strong>: Logging at a row level, which generates a lot of log data</li></ul><p><strong>Debug</strong> and <strong>Row Level</strong> logging levels contain information you may consider too sensitive to be shown. Consider the sensitivity of your data when selecting these logging levels. See the <strong>Administer Pentaho Data Integration and Analytics</strong> document for instructions on how best to use these logging methods.</p> |
| **Enable safe mode**           | Checks every row passed through your job and ensure all layouts are identical. If a row does not have the same layout as the first row, an error is generated and reported.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| **Start job at**               | Specifies an alternative starting entry for your job. All the current entries in your job are listed as options in the dropdown menu.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| **Gather performance metrics** | Monitors the performance of your job execution through these metrics. [Using Performance Graphs](https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/data-integration-perspective-in-the-pdi-client/logging-and-performance-monitoring) shows how to visually analyze these metrics.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |