projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| 73b818e7 JR |
1 | lttng-clear(1) |
| 2 | =============== | |
| 3 | :revdate: 6 November 2019 | |
| 4 | ||
| 5 | NAME | |
| 6 | ---- | |
| 7 | lttng-clear - Clear a tracing session | |
| 8 | ||
| 9 | ||
| 10 | SYNOPSIS | |
| 11 | -------- | |
| 12 | [verse] | |
| 13 | *lttng* ['linkgenoptions:(GENERAL OPTIONS)'] *clear* [option:--all | 'SESSION'] | |
| 14 | ||
| 15 | ||
| 16 | DESCRIPTION | |
| 17 | ----------- | |
| 18 | The `lttng clear` command clears one or more tracing sessions. | |
| 19 | ||
| 20 | If no options are specified, the current tracing session is cleared | |
| 21 | (see man:lttng-create(1) for more information about the current | |
| 22 | tracing session). | |
| 23 | ||
| 24 | If 'SESSION' is specified, the existing tracing session named 'SESSION' | |
| 25 | is cleared. | |
| 26 | ||
| 27 | If the option:--all option is used, *all* the tracing sessions, as listed | |
| 28 | in the output of `lttng list`, are cleared. | |
| 29 | ||
| 30 | Clearing a tracing session deletes the contents of the tracing buffers and | |
| 31 | all local or streamed trace data. | |
| 32 | ||
| 33 | If a session is configured in snapshot mode, only the tracing buffers are cleared. | |
| 34 | ||
| 35 | If at least one rotation occurred, only the tracing buffers and the current | |
| 36 | trace chunks are cleared. Previous trace chunks are not cleared. | |
| 37 | ||
| 38 | Note that a lttng-relayd daemon can be configured to disallow clear operations | |
| 39 | using LTTNG_RELAYD_DISALLOW_CLEAR. Clear commands performed on a streaming | |
| 40 | session utilizing such lttng-relayd daemon will fail. | |
| 41 | ||
| 42 | include::common-cmd-options-head.txt[] | |
| 43 | ||
| 44 | ||
| 45 | option:-a, option:--all:: | |
| 46 | Clear all tracing sessions. | |
| 47 | ||
| 48 | include::common-cmd-help-options.txt[] | |
| 49 | ||
| 50 | ||
| 51 | include::common-cmd-footer.txt[] | |
| 52 | ||
| 53 | ||
| 54 | SEE ALSO | |
| 55 | -------- | |
| 56 | man:lttng-rotate(1), | |
| 57 | man:lttng-set-session(1), | |
| 58 | man:lttng(1) |