diff --git a/releasenotes/notes/mock-datasource-1c9b427bc16f4a59.yaml b/releasenotes/notes/mock-datasource-1c9b427bc16f4a59.yaml
new file mode 100644
index 000000000..65e5bc57d
--- /dev/null
+++ b/releasenotes/notes/mock-datasource-1c9b427bc16f4a59.yaml
@@ -0,0 +1,4 @@
+---
+features:
+  - Added a new ``Mock datasource``, which can mock an entire graph and allows
+    testing large scale stability as well as performance.
diff --git a/releasenotes/notes/performance-bug-fixes-a2b5e85ee37bba93.yaml b/releasenotes/notes/performance-bug-fixes-a2b5e85ee37bba93.yaml
new file mode 100644
index 000000000..746c2893d
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+++ b/releasenotes/notes/performance-bug-fixes-a2b5e85ee37bba93.yaml
@@ -0,0 +1,3 @@
+---
+fixes:
+  - Many bug fixes related to performance and stability.
diff --git a/releasenotes/notes/services-management-improvements-899c011e57002e84.yaml b/releasenotes/notes/services-management-improvements-899c011e57002e84.yaml
new file mode 100644
index 000000000..66c22b2bb
--- /dev/null
+++ b/releasenotes/notes/services-management-improvements-899c011e57002e84.yaml
@@ -0,0 +1,10 @@
+---
+features:
+  - The collector service was changed to run on demand instead of periodically,
+    hence it can now be run in active-active mode. This is as part of a larger
+    design to improve high availability.
+  - Oslo service was replaced by cotyledon, so Vitrage uses real threads and
+    multiprocessing. This change removes unnecessary complications of using
+    eventlets and timers.
+  - Created a dedicated process for the api handler, for better handling api
+    calls under stress.