lttng-destroy — Destroy an LTTng tracing session
lttng destroy command destroys one or more tracing sessions.
If no options are specified, the current tracing session is destroyed (see lttng-create(1) for more information about the current tracing session).
If SESSION is specified, the existing tracing session named SESSION
lttng list outputs all the existing tracing sessions
--all option is used, all the tracing sessions, as listed
in the output of
lttng list, are destroyed.
Destroying a tracing session stops any tracing running within the
latter. By default, the implicit lttng-stop(1) command invoked by
lttng destroy command ensures that the tracing session’s trace
data is valid before returning. With the
--no-wait option, the
lttng-stop(1) command finishes immediately, hence a local trace
might not be valid when the command is done. In this case, there is no
way to know when the trace becomes valid.
Destroying a tracing session does not destroy the recorded trace data, if any; it frees resources acquired by the session daemon and tracer side, making sure to flush all trace data.
If at least one rotation occurred during the chosen tracing session’s
lifetime (see lttng-rotate(1) and lttng-enable-rotation(1)), and
--no-wait option, all the tracing session’s output
directory’s subdirectories are considered trace chunk archives once the
command returns: it is safe to read them, modify them, move them, or
Set to 1 to abort the process after the first error is encountered.
$HOME environment variable. Useful when the user
running the commands has a non-writable home directory.
Absolute path to the man pager to use for viewing help information
about LTTng commands (using lttng-help(1) or
lttng COMMAND --help).
Path in which the
session.xsd session configuration XML
schema may be found.
Full session daemon binary path.
--sessiond-path option has precedence over this
Note that the lttng-create(1) command can spawn an LTTng session daemon automatically if none is running. See lttng-sessiond(8) for the environment variables influencing the execution of the session daemon.
User LTTng runtime configuration.
This is where the per-user current tracing session is stored between executions of lttng(1). The current tracing session can be set with lttng-set-session(1). See lttng-create(1) for more information about tracing sessions.
Default output directory of LTTng traces. This can be overridden
--output option of the lttng-create(1)
User LTTng runtime and configuration directory.
$LTTNG_HOME defaults to
$HOME when not explicitly set.
Command warning (something went wrong during the command)
If you encounter any issue or usability problem, please report it on the LTTng bug tracker.
Special thanks to Michel Dagenais and the DORSAL laboratory at École Polytechnique de Montréal for the LTTng journey.
Also thanks to the Ericsson teams working on tracing which helped us greatly with detailed bug reports and unusual test cases.