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| --- |
| title: System-level Configuration |
| --- |
| |
| The parameters in the sections below are set at the system level and thus do not |
| apply to any specific component. |
| |
| ## General |
| |
| Config | Meaning | Default |
| :----- |:------- |:------- |
| `heron.check.tmaster.location.interval.sec` | The interval, in seconds, after which to check if the topology master location has been fetched or not | 120 |
| `heron.metrics.export.interval` | The interval, in seconds, at which components export metrics to the topology's Metrics Manager |
| |
| ## Logging |
| |
| Config | Meaning | Default |
| :----- |:------- |:------- |
| `heron.logging.directory` | The relative path to the logging directory | `log-files` |
| `heron.logging.maximum.size.mb` | The maximum log file size (in megabytes) | 100 |
| `heron.logging.maximum.files` | The maximum number of log files | 5 |
| `heron.logging.prune.interval.sec` | The time interval, in seconds, at which Heron prunes log files | 300 |
| `heron.logging.flush.interval.sec` | The time interval, in seconds, at which Heron flushes log files | 10 |
| `heron.logging.err.threshold` | The threshold level to log error | 3 |
