[7.5][docs] 7.5.0 release notes and breaking changes (#2908)

docs/breaking-changes.asciidoc

@@ -4,7 +4,18 @@ APM Server is built on top of {beats-ref}/index.html[libbeat].
 As such, any breaking change in libbeat is also considered to be a breaking change in APM Server.
 
 [float]
-==== HEAD
+==== 7.5
+* Introduced dedicated `apm-server.ilm.setup.*` flags.
+This means you can now customize ILM behavior from within the APM Server configuration.
+As a side effect, `setup.template.*` settings will be ignored for ILM related templates per event type.
+See {apm-server-ref}/ilm.html#ilm-setup[set up ILM] for more information.
+
+* By default, ILM policies will not longer be versioned.
+All event types will switch to the new default policy: rollover after 30 days or when reaching a size 50gb.
+See {apm-server-ref}/ilm.html#ilm-default[default policy] for more information.
+
+* To make use of all the new features introduced in 7.5,
+you must ensure you are using version 7.5+ of APM Server and version 7.5+ of Kibana.
 
 [float]
 ==== 7.0

docs/guide/apm-breaking-changes.asciidoc

@@ -3,6 +3,7 @@
 
 This section discusses the changes that you need to be aware of when migrating your application from one version of APM to another.
 
+* <<breaking-7.5.0>>
 * <<breaking-7.4.0>>
 * <<breaking-7.3.0>>
 * <<breaking-7.2.0>>
@@ -22,6 +23,29 @@ Also see <<apm-release-notes>>.
 
 // end::notable-v8-breaking-changes[]
 
+[[breaking-7.5.0]]
+=== 7.5.0 APM Breaking changes
+
+// tag::notable-v75-breaking-changes[]
+
+APM Server::
++
+* Introduced dedicated `apm-server.ilm.setup.*` flags.
+This means you can now customize ILM behavior from within the APM Server configuration.
+As a side effect, `setup.template.*` settings will be ignored for ILM related templates per event type.
+See {apm-server-ref}/ilm.html#ilm-setup[set up ILM] for more information.
++
+* By default, ILM policies will not longer be versioned.
+All event types will switch to the new default policy: rollover after 30 days or when reaching a size 50gb.
+See {apm-server-ref}/ilm.html#ilm-default[default policy] for more information.
+
+APM::
++
+* To make use of all the new features introduced in 7.5,
+you must ensure you are using version 7.5+ of APM Server and version 7.5+ of Kibana.
+
+// tag::notable-v75-breaking-changes[]
+
 [[breaking-7.4.0]]
 === 7.4.0 APM Breaking changes
 

docs/guide/apm-release-notes.asciidoc

@@ -7,6 +7,7 @@ For a full list of changes, see the
 {apm-server-ref-v}/release-notes.html[APM Server Release Notes] or the
 {kibana-ref}/release-notes.html[Kibana Release Notes].
 
+* <<release-highlights-7.5.0>>
 * <<release-highlights-7.4.0>>
 * <<release-highlights-7.3.0>>
 * <<release-highlights-7.2.0>>
@@ -25,6 +26,46 @@ For a full list of changes, see the
 
 // end::notable-v8-highlights[]
 
+[[release-highlights-7.5.0]]
+=== APM version 7.5.0
+
+// tag::notable-v75-highlights[]
+
+IMPORTANT: To make use of all the new features introduced in 7.5,
+you must ensure you are using version 7.5+ of APM Server and version 7.5+ of Kibana.
+
+*APM app in Kibana*
+
+* {kibana-ref}/transactions.html[Aggregate Service Breakdown Charts] is GA.
+Visualize where your applications and services are spending most of their
+time, and find the root cause of a performance problem quickly.
+Not yet available for the .NET Agent.
+
+[role="screenshot"]
+image::images/breakdown-release-notes.png[Aggregate Service Breakdown Charts]
+
+* {kibana-ref}/agent-configuration.html[APM Agent remote configuration] is GA.
+View and edit certain configurations directly in Kibana without having to restart your Agents.
+In 7.5, we're introducing two additional configurations:
+** `CAPTURE_BODY` - Optionally capture the request body of an HTTP transaction.
+** `TRANSACTION_MAX_SPANS` - Limit the number of spans recorded per transaction.
+
+In addition, Agent remote configuration now supports all services and environments.
+This means you can configure multiple services and environments in just one setting.
+
+[role="screenshot"]
+image::images/remote-config-release-notes.png[APM Agent configuration]
+
+* {apm-java-ref}/metrics.html[JVM instance level visibility]:
+It's easier than ever to troubleshoot your individual JVM instances.
+Select a JVM to see individual CPU usage, memory usage, heap or non-heap memory,
+thread count, garbage collection rate, and garbage collection time spent per minute.
+
+[role="screenshot"]
+image::images/jvm-release-notes.png[JVM instance level visibility]
+
+// end::notable-v75-highlights[]
+
 [[release-highlights-7.4.0]]
 === APM version 7.4.0