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DOCS-889 changes to database profiler in 2.2 #559

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Jan 14, 2013
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DOCS-889 changes to database profiler in 2.2 #559

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18 changes: 18 additions & 0 deletions source/reference/database-profiler.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -118,6 +118,8 @@ operation.

.. stats:: ntoreturn

.. versionchanged:: 2.2

The number of documents the operation specified to return. For
example, the :dbcommand:`profile` command would return one document
(a results document) so the :status:`ntoreturn` value would be ``1``. The
Expand All @@ -129,8 +131,14 @@ operation.
:method:`find() <db.collection.find()>` command with no limit
specified.

In version 2.0, this information was provided for ``query`` and
``command`` operations. In 2.2, this information is also provided for
``getmore`` operations.

.. stats:: ntoskip

.. versionadded:: 2.2

The number of documents the :method:`skip() <cursor.skip()>` method
specified to skip.

Expand All @@ -156,21 +164,29 @@ operation.

.. stats:: nmoved

.. versionadded:: 2.2

The number of documents moved on disk by the operation.

.. stats:: nupdated

.. versionadded:: 2.2

The number of documents updated by the operation.

.. stats:: keyUpdates

.. versionadded:: 2.2

The number of :doc:`index </indexes>` keys the update changed in
the operation. Changing an index key
carries a small performance cost because the database must remove the old
key and inserts a new key into the B-tree index.

.. stats:: numYield

.. versionadded:: 2.2

The number of times the operation yielded to allow other operations
to complete. Typically, operations yield when they need access to
data that MongoDB has not yet fully read into memory. This allows
Expand All @@ -180,6 +196,8 @@ operation.

.. stats:: lockStats

.. versionadded:: 2.2

The time in microseconds the operation spent acquiring and holding
locks. This field reports data for the following lock types:

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