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-rw-r--r--docs/release-notes.rst12
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diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 1d9f80646e..c8500652bb 100644
--- a/docs/release-notes.rst
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@@ -43,6 +43,7 @@ Bug Fixes
Features
--------
+ - `CPS-1795 <https://jira.onap.org/browse/CPS-1795>`_ Double performance of CPS write operations (via write batching)
- `CPS-2018 <https://jira.onap.org/browse/CPS-2018>`_ Improve performance of CPS update operations.
- `CPS-2019 <https://jira.onap.org/browse/CPS-2019>`_ Improve performance of saving CM handles.
@@ -50,6 +51,17 @@ Notes
-----
- Java API method CpsDataService::saveListElementsBatch has been removed as part of CPS-2019.
+Known Limitations, Issues and Workarounds
+-----------------------------------------
+
+*System Limitations*
+
+For upgrading, CPS uses Liquibase for database upgrades. In order to enable Hibernate write batching
+(`CPS-1795 <https://jira.onap.org/browse/CPS-1795>`_), a change to the database entity ID generation is required.
+As such, *this release does not fully support In-Service Software Upgrade* - CPS will not store new DataNodes and
+NCMP will not register new CM-handles during an upgrade with old and new versions of CPS running concurrently.
+Other operations (read, update, delete) are not impacted.
+
Version: 3.4.1
==============