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DOCS-14846 non system user ulimit #5991

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Oct 13, 2021
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DOCS-14846 non system user ulimit #5991

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21 changes: 21 additions & 0 deletions source/reference/ulimit.txt
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Expand Up @@ -150,6 +150,27 @@ change to system limits made using ``ulimit`` may revert following
a system restart. Check your distribution and operating
system documentation for more information.

You should typically start :binary:`~bin.mongod` using ``systemctl``,
which uses the ``ulimit`` settings:

.. code-block:: bash

systemctl start mongod.service

If you *do not* start :binary:`~bin.mongod` using ``systemctl``,
``systemd`` overrides some of the ``ulimit`` settings. For example, if
you start :binary:`~bin.mongod` as shown in the following command, then
a user slice (such as ``user-1000.slice``) ``systemd`` setting is used:

.. code-block:: bash

mongod --config ~/mongod.conf

.. note::

A ``systemd`` user slice limits the resources for the user's
processes.

macOS
`````

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