Merge pull request #11395 from jingyih/update_changelog

CHANGELOG: update from PR #11374

CHANGELOG-3.3.md

@@ -17,6 +17,7 @@ See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Add [`etcd_cluster_version`](https://github.com/etcd-io/etcd/pull/11261) Prometheus metric.
+- Add [`etcd_debugging_mvcc_total_put_size_in_bytes`](https://github.com/etcd-io/etcd/pull/11374) Prometheus metric.
 
 ### etcdserver
 

CHANGELOG-3.4.md

@@ -15,6 +15,13 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.4.3...v3.4.4) and
 
 **Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.4 upgrade guide](https://github.com/etcd-io/etcd/blob/master/Documentation/upgrades/upgrade_3_4.md).**
 
+### Metrics, Monitoring
+
+See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+
+Note that any `etcd_debugging_*` metrics are experimental and subject to change.
+
+- Add [`etcd_debugging_mvcc_total_put_size_in_bytes`](https://github.com/etcd-io/etcd/pull/11374) Prometheus metric.
 
 ## [v3.4.3](https://github.com/etcd-io/etcd/releases/tag/v3.4.3) (2019-10-24)
 

CHANGELOG-3.5.md

@@ -64,6 +64,7 @@ Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 - Add [`etcd_debugging_mvcc_current_revision`](https://github.com/etcd-io/etcd/pull/11126) Prometheus metric.
 - Add [`etcd_debugging_mvcc_compact_revision`](https://github.com/etcd-io/etcd/pull/11126) Prometheus metric.
 - Change [`etcd_cluster_version`](https://github.com/etcd-io/etcd/pull/11254) Prometheus metrics to include only major and minor version.
+- Add [`etcd_debugging_mvcc_total_put_size_in_bytes`](https://github.com/etcd-io/etcd/pull/11374) Prometheus metric.
 
 ### etcd server