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DOCS-841 add examples for usePowerOf2Sizes, remove random double quote #446

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Dec 4, 2012
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DOCS-841 add examples for usePowerOf2Sizes, remove random double quote #446

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DOCS-841 add examples for usePowerOf2Sizes, remove random double quote
Dec 4, 2012
808677f
DOCS-841 change from [] to <> for variable portions
Dec 4, 2012
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25 changes: 20 additions & 5 deletions source/reference/command/collMod.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -15,11 +15,11 @@ collMod

.. code-block:: javascript

db.runCommand( {"collMod" : [collection] , "[flag]" : [value]" } )
db.runCommand( {"collMod" : <collection> , "<flag>" : <value> } )

In this command substitute ``[collection]`` with the name of the
collection, and ``[flag]`` and ``[value]`` with the flag and value
you want to set.
In this command substitute ``<collection>`` with the name of a
collection in the current database, and ``<flag>`` and ``<value>``
with the flag and value you want to set.

.. index:: document; space allocation
.. index:: usePowerOf2Sizes
Expand All @@ -38,6 +38,21 @@ collMod
will be inserting and deleting large numbers of documents to
ensure that MongoDB will effectively use space on disk.

.. example::

Enable :collflag:`usePowerOf2Sizes` on the collection `sensor_readings`:

.. code-block:: javascript

db.runCommand({collMod: "sensor_readings", usePowerOf2Sizes:true })

Disable :collflag:`usePowerOf2Sizes` on the collection `products`:

.. code-block:: javascript

db.runCommand( { collMod: "products", "usePowerOf2Sizes": false })


.. note::
.. versionchanged:: 2.2.1
If you're using :collflag:`usePowerOf2Sizes`, ensure
Expand All @@ -51,6 +66,6 @@ collMod

.. Commenting out the following after DOCS-717, it does take
a lock but its to cover a very small metadata change.

This command obtains a write lock on the affected database
and will block other operations until it has completed.