mirror of
https://github.com/nicolargo/glances.git
synced 2024-12-26 02:31:36 +03:00
71 lines
2.5 KiB
ReStructuredText
71 lines
2.5 KiB
ReStructuredText
.. _memory:
|
||
|
||
Memory
|
||
======
|
||
|
||
Glances uses two columns: one for the ``RAM`` and one for the ``SWAP``.
|
||
|
||
.. image:: ../_static/mem.png
|
||
|
||
If enough space is available, Glances displays extended information for
|
||
the ``RAM``:
|
||
|
||
.. image:: ../_static/mem-wide.png
|
||
|
||
Stats description:
|
||
|
||
- **percent**: the percentage usage calculated as (total-available)/total*100.
|
||
- **total**: total physical memory available.
|
||
- **used**: memory used, calculated differently depending on the platform and
|
||
designed for informational purposes only.
|
||
It's compute as following:
|
||
used memory = total - free (with free = available + buffers + cached)
|
||
- **free**: memory not being used at all (zeroed) that is readily available;
|
||
note that this doesn’t reflect the actual memory available (use ‘available’
|
||
instead).
|
||
- **active**: (UNIX): memory currently in use or very recently used, and so it
|
||
is in RAM.
|
||
- **inactive**: (UNIX): memory that is marked as not used.
|
||
- **buffers**: (Linux, BSD): cache for things like file system metadata.
|
||
- **cached**: (Linux, BSD): cache for various things.
|
||
|
||
Additional stats available in through the API:
|
||
|
||
- **available**: the actual amount of available memory that can be given
|
||
instantly to processes that request more memory in bytes; this is calculated
|
||
by summing different memory values depending on the platform (e.g. free +
|
||
buffers + cached on Linux) and it is supposed to be used to monitor actual
|
||
memory usage in a cross platform fashion.
|
||
- **wired**: (BSD, macOS): memory that is marked to always stay in RAM. It is
|
||
never moved to disk.
|
||
- **shared**: (BSD): memory that may be simultaneously accessed by multiple
|
||
processes.
|
||
|
||
A character is also displayed just after the MEM header and shows the
|
||
trend value:
|
||
|
||
======== ==============================================================
|
||
Trend Status
|
||
======== ==============================================================
|
||
``-`` MEM value is equal to the mean of the six latests refreshes
|
||
``\`` MEM value is lower than the mean of the six latests refreshes
|
||
``/`` MEM value is higher than the mean of the six latests refreshes
|
||
======== ==============================================================
|
||
|
||
Alerts are only set for used memory and used swap.
|
||
|
||
Legend:
|
||
|
||
======== ============
|
||
RAM/Swap Status
|
||
======== ============
|
||
``<50%`` ``OK``
|
||
``>50%`` ``CAREFUL``
|
||
``>70%`` ``WARNING``
|
||
``>90%`` ``CRITICAL``
|
||
======== ============
|
||
|
||
.. note::
|
||
Limit values can be overwritten in the configuration file under
|
||
the ``[memory]`` and/or ``[memswap]`` sections.
|