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DOCS-13625 prohibit reads from system.profile in transaction #5513

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Jul 8, 2021
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DOCS-13625 prohibit reads from system.profile in transaction #5513

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1 change: 1 addition & 0 deletions snooty.toml
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Expand Up @@ -171,6 +171,7 @@ toc_landing_pages = [
"/tutorial/install-mongodb-on-suse",
"/tutorial/install-mongodb-on-ubuntu",
"/tutorial/install-mongodb-on-windows",
"/tutorial/manage-the-database-profiler",
"/tutorial/query-documents",
"/tutorial/remove-documents",
"/tutorial/update-documents"
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7 changes: 5 additions & 2 deletions source/reference/database-profiler.txt
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Expand Up @@ -30,15 +30,18 @@ use normal MongoDB queries on the :data:`system.profile
database, the profiler will profile some write activity, even for
databases that are otherwise read-only.

.. versionchanged:: 3.4

:dbcommand:`currentOp` and the
:doc:`database profiler</reference/database-profiler>` report the same
basic diagnostic information for all CRUD operations, including the
following:

.. include:: /includes/fact-diagnostic-info.rst

Starting in MongoDB 4.4, it is no longer possible to perform any
operation, including reads, on the :data:`system.profile
<<database>.system.profile>` collection from within a
:doc:`transaction </core/transactions>`.

Example ``system.profile`` Document
-----------------------------------

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5 changes: 5 additions & 0 deletions source/tutorial/manage-the-database-profiler.txt
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Expand Up @@ -357,6 +357,11 @@ To view profiling information, query the :data:`system.profile
:ref:`database-profiling-example-queries`. For an explanation of the
output data, see :doc:`/reference/database-profiler`.

Starting in MongoDB 4.4, it is no longer possible to perform any
operation, including reads, on the :data:`system.profile
<<database>.system.profile>` collection from within a
:doc:`transaction </core/transactions>`.

.. tip::

You can use :query:`$comment` to add data to the query predicate to
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