установите расписание ротации сеанса трассировки (Set a tracing session's rotation schedule)
Имя (Name)
lttng-enable-rotation - Set a tracing session's rotation schedule
Синопсис (Synopsis)
lttng [GENERAL OPTIONS] enable-rotation (--timer=PERIOD | --size=SIZE)
[--session=SESSION]
Описание (Description)
The lttng enable-rotation command sets a rotation schedule for
the current tracing session, or for the tracing session named
SESSION if provided. See lttng-rotate(1) for more information
about the concepts of a tracing session rotation and a trace
chunk.
With the --timer option, the rotation schedule is set so that an
automatic rotation occurs at least every PERIOD (microseconds
without a unit suffix).
With the --size option, the rotation schedule is set so that an
automatic rotation occurs every time the total size of the
flushed part of the current trace chunk is at least SIZE (bytes
without a unit suffix).
With both the --timer and --size options, LTTng checks the
schedule condition periodically using the monitor timers of the
tracing session's channels. This means that, with the --timer
option, the automatic rotation can occur when the elapsed time
since the last automatic rotation is greater than PERIOD, and
with the --size option, the automatic rotation can occur when the
size of the flushed part of the current trace chunk is greater
than SIZE. See the --monitor-timer option in
lttng-enable-channel(1) for more information about the monitor
timer.
The naming convention of a trace chunk archive which an automatic
rotation creates is the same as with the immediate rotation
command, lttng-rotate(1).
You can unset a rotation schedule with the
lttng-disable-rotation(1) command.
See LIMITATIONS for important limitations regarding this command.
Параметры (Options)
General options are described in lttng(1).
Rotation schedule condition
One of:
--size=SIZE
Set a rotation schedule so that an automatic rotation occurs
every time the total size of the flushed part of the current
trace chunk is at least SIZE bytes. The k (kiB), M (MiB), and
G (GiB) suffixes are supported.
--timer=PERIOD
Set a rotation schedule so that an automatic rotation occurs
at least every PERIOD microseconds. The ms (milliseconds), s
(seconds), m (minutes), and h (hours) suffixes are supported.
Target
-s SESSION, --session=SESSION
Set a rotation schedule for the tracing session named SESSION
instead of the current tracing session.
Program information
-h, --help
Show command help.
This option, like lttng-help(1), attempts to launch
/usr/bin/man to view the command's man page. The path to the
man pager can be overridden by the LTTNG_MAN_BIN_PATH
environment variable.
--list-options
List available command options.
Ограничения (Limitations)
The lttng enable-rotation command only works when:
• The tracing session is created in normal mode or in network
streaming mode (see lttng-create(1)).
• No channel was created with a configured trace file count or
size limit (see the --tracefile-size and --tracefile-count
options in lttng-enable-channel(1)).
For a given tracing session, LTTng only performs an automatic
rotation when no other rotation is currently happening.
Переменные окружения (Environment variables)
LTTNG_ABORT_ON_ERROR
Set to 1 to abort the process after the first error is
encountered.
LTTNG_HOME
Overrides the $HOME environment variable. Useful when the
user running the commands has a non-writable home directory.
LTTNG_MAN_BIN_PATH
Absolute path to the man pager to use for viewing help
information about LTTng commands (using lttng-help(1) or
lttng COMMAND --help).
LTTNG_SESSION_CONFIG_XSD_PATH
Path in which the session.xsd session configuration XML
schema may be found.
LTTNG_SESSIOND_PATH
Full session daemon binary path.
The --sessiond-path option has precedence over this
environment variable.
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.
Файлы (Files)
$LTTNG_HOME/.lttngrc
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.
$LTTNG_HOME/lttng-traces
Default output directory of LTTng traces. This can be
overridden with the --output option of the lttng-create(1)
command.
$LTTNG_HOME/.lttng
User LTTng runtime and configuration directory.
$LTTNG_HOME/.lttng/sessions
Default location of saved user tracing sessions (see
lttng-save(1) and lttng-load(1)).
/usr/local/etc/lttng/sessions
System-wide location of saved tracing sessions (see
lttng-save(1) and lttng-load(1)).
Note
$LTTNG_HOME defaults to $HOME when not explicitly set.
Статус выхода (Exit)
0
Success
1
Command error
2
Undefined command
3
Fatal error
4
Command warning (something went wrong during the command)
Ошибки (баги) (Bugs)
If you encounter any issue or usability problem, please report it
on the LTTng bug tracker <https://bugs.lttng.org/projects/lttng-
tools>.
Ресурсы (Resources)
• LTTng project website <https://lttng.org>
• LTTng documentation <https://lttng.org/docs>
• Git repositories <http://git.lttng.org>
• GitHub organization <http://github.com/lttng>
• Continuous integration <http://ci.lttng.org/>
• Mailing list <http://lists.lttng.org> for support and
development: lttng-dev@lists.lttng.org
• IRC channel <irc://irc.oftc.net/lttng>: #lttng on
irc.oftc.net
