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DOCS-1616, DOCS-1655: clarifying hard/soft ulimit, adding note of nproc ... #1240

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DOCS-1616, DOCS-1655: clarifying hard/soft ulimit, adding note of nproc ... #1240

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13 changes: 13 additions & 0 deletions source/reference/ulimit.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,14 @@ basis. These limits prevent single users from using too many system
resources. Sometimes, these limits have low default values that can
cause a number of issues in the course of normal MongoDB operation.

.. note::

RHEL and CentOS 6 place a max process limitation of 1024 which
overrides ``ulimit`` settings. Edit the ``soft nproc`` and
``hard nproc`` values in
the ``/etc/security/limits.d/90-nproc.conf`` file to increase
the process limit.

.. _system-resource-utilization:

Resource Utilization
Expand Down Expand Up @@ -78,6 +86,11 @@ Review and Set Resource Limits
``ulimit``
~~~~~~~~~~

.. note::

Ensure that you set both the "hard" and the "soft" ``ulimit`` values
to the recommended value.

You can use the ``ulimit`` command at the system prompt to check
system limits, as in the following example:

Expand Down