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Diffstat (limited to 'Doc/using/cmdline.rst')
| -rw-r--r-- | Doc/using/cmdline.rst | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst index cfd6045..d1822fb 100644 --- a/Doc/using/cmdline.rst +++ b/Doc/using/cmdline.rst @@ -381,10 +381,11 @@ Miscellaneous options * ``-X faulthandler`` to enable :mod:`faulthandler`; * ``-X showrefcount`` to enable the output of the total reference count and memory blocks (only works on debug builds); - * ``-X tracemalloc`` to enable :mod:`tracemalloc`. - * ``-X tracemalloc=NFRAME`` to enable :mod:`tracemalloc`, *NFRAME* is the - maximum number of frames stored in a trace: see the - :func:`tracemalloc.set_traceback_limit` function. + * ``-X tracemalloc`` to start tracing Python memory allocations using the + :mod:`tracemalloc` module. By default, only the most recent frame is + stored in a traceback of a trace. Use ``-X tracemalloc=NFRAME`` to start + tracing with a traceback limit of *NFRAME* frames. See the + :func:`tracemalloc.start` for more information. It also allows to pass arbitrary values and retrieve them through the :data:`sys._xoptions` dictionary. @@ -600,10 +601,11 @@ conflict. .. envvar:: PYTHONTRACEMALLOC - If this environment variable is set to a non-empty string, all memory - allocations made by Python are traced by the :mod:`tracemalloc` module. - The value of the variable is the maximum number of frames stored in a trace: - see the :func:`tracemalloc.set_traceback_limit` function. + If this environment variable is set to a non-empty string, start tracing + Python memory allocations using the :mod:`tracemalloc` module. The value of + the variable is the maximum number of frames stored in a traceback of a + trace. For example, ``PYTHONTRACEMALLOC=1`` stores only the most recent + frame. See the :func:`tracemalloc.start` for more information. .. versionadded:: 3.4 |