| | 1 | lttng-clear(1) |
| | 2 | ============== |
| | 3 | :revdate: 17 May 2021 |
| | 4 | |
| | 5 | NAME |
| | 6 | ---- |
| | 7 | lttng-clear - Clear an LTTng tracing session |
| | 8 | |
| | 9 | |
| | 10 | SYNOPSIS |
| | 11 | -------- |
| | 12 | [verse] |
| | 13 | *lttng* ['linkgenoptions:(GENERAL OPTIONS)'] *clear* ['SESSION' | option:--all] |
| | 14 | |
| | 15 | |
| | 16 | DESCRIPTION |
| | 17 | ----------- |
| | 18 | The `lttng clear` command clears one or more tracing sessions, that is, |
| | 19 | it deletes the contents of their tracing buffers and of all their local |
| | 20 | and streamed trace data. |
| | 21 | |
| | 22 | See man:lttng-concepts(7) to learn more about tracing sessions. |
| | 23 | |
| | 24 | The `clear` command clears: |
| | 25 | |
| | 26 | Without any option:: |
| | 27 | The current tracing session. |
| | 28 | + |
| | 29 | See man:lttng-concepts(7) to learn more about the current tracing |
| | 30 | session. |
| | 31 | |
| | 32 | With the 'SESSION' argument:: |
| | 33 | The tracing session named 'SESSION'. |
| | 34 | |
| | 35 | With the option:--all option:: |
| | 36 | *All* the tracing sessions of the connected session daemon for your |
| | 37 | Unix user, or for all users if your Unix user is `root`, as listed |
| | 38 | in the output of `lttng list` (see man:lttng-list(1)). |
| | 39 | + |
| | 40 | See the ``Session daemon connection'' section of man:lttng(1) to learn |
| | 41 | how a user application connects to a session daemon. |
| | 42 | |
| | 43 | If a tracing session is configured in snapshot mode (see the |
| | 44 | nloption:--snapshot option of the man:lttng-create(1) command), the |
| | 45 | `clear` command only clears the tracing buffers. |
| | 46 | |
| | 47 | For a given tracing session, if at least one rotation occurred (see |
| | 48 | man:lttng-concepts(7)), the `clear` command only clears its tracing |
| | 49 | buffers and its current trace chunk, :not: its archived trace chunks. |
| | 50 | |
| | 51 | NOTE: The nloption:--disallow-clear option and the |
| | 52 | `LTTNG_RELAYD_DISALLOW_CLEAR` environment variable of |
| | 53 | man:lttng-relayd(8) can disable remote clearing operations. If LTTng |
| | 54 | sends tracing data over the network for the selected tracing session(s) |
| | 55 | to an LTTng relay daemon configured as such, the `clear` command fails. |
| | 56 | |
| | 57 | See the ``<<examples,EXAMPLES>>'' section below for usage examples. |
| | 58 | |
| | 59 | |
| | 60 | include::common-lttng-cmd-options-head.txt[] |
| | 61 | |
| | 62 | |
| | 63 | Recording target |
| | 64 | ~~~~~~~~~~~~~~~~ |
| | 65 | option:-a, option:--all:: |
| | 66 | Clear all the tracing sessions of your Unix user, or of all users if |
| | 67 | your Unix user is `root`, as listed in the output of |
| | 68 | man:lttng-list(1), instead of the current tracing session or the |
| | 69 | tracing session named 'SESSION'. |
| | 70 | |
| | 71 | |
| | 72 | include::common-lttng-cmd-help-options.txt[] |
| | 73 | |
| | 74 | |
| | 75 | include::common-lttng-cmd-after-options.txt[] |
| | 76 | |
| | 77 | |
| | 78 | [[examples]] |
| | 79 | EXAMPLES |
| | 80 | -------- |
| | 81 | .Clear the current tracing session. |
| | 82 | ==== |
| | 83 | [role="term"] |
| | 84 | ---- |
| | 85 | $ lttng clear |
| | 86 | ---- |
| | 87 | ==== |
| | 88 | |
| | 89 | .Clear a specific tracing session. |
| | 90 | ==== |
| | 91 | [role="term"] |
| | 92 | ---- |
| | 93 | $ lttng clear my-session |
| | 94 | ---- |
| | 95 | ==== |
| | 96 | |
| | 97 | .Clear all tracing sessions. |
| | 98 | ==== |
| | 99 | See the option:--all option. |
| | 100 | |
| | 101 | [role="term"] |
| | 102 | ---- |
| | 103 | $ lttng clear --all |
| | 104 | ---- |
| | 105 | ==== |
| | 106 | |
| | 107 | |
| | 108 | include::common-footer.txt[] |
| | 109 | |
| | 110 | |
| | 111 | SEE ALSO |
| | 112 | -------- |
| | 113 | man:lttng(1), |
| | 114 | man:lttng-create(1), |
| | 115 | man:lttng-concepts(7), |
| | 116 | man:lttng-relayd(8) |
projects / lttng-tools.git / blame_incremental