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Remove reference to MMAPv1 #6209

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13 changes: 0 additions & 13 deletions source/reference/operator/aggregation/sample.txt
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Expand Up @@ -47,19 +47,6 @@ If any of the previous conditions are false, :pipeline:`$sample`:
Random sorts are subject to the :ref:`sort memory restrictions
<sort-memory-limit>`.

MMAPv1 May Return Duplicate Documents
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

If you are using the:

- MMAPv1 storage engine, :pipeline:`$sample` may return the same
document more than once in the result set.

- :ref:`WiredTiger <storage-wiredtiger>` or
:ref:`in-memory <storage-inmemory>` storage engine,
:pipeline:`$sample` does not return duplicate documents. WiredTiger
is the default storage engine as of MongoDB 3.2.

Example
--------

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