Mention that disk stat metric computation is disabled by default
This announces the breaking change added by this change:
https://gerrit-review.googlesource.com/c/gerrit/+/263499
Change-Id: I6126a4b829fff94cefc1e01c333b5f1b99aab1f2
diff --git a/pages/site/releases/3.0.md b/pages/site/releases/3.0.md
index bfabc81..86492ff 100644
--- a/pages/site/releases/3.0.md
+++ b/pages/site/releases/3.0.md
@@ -192,6 +192,20 @@
## Bugfix Releases
+### 3.0.9
+
+* Breaking Changes
+
+ * Metrics: Cache disk stat metric computation is disabled by default
+
+ Calculation of the cache disks stat metrics for persistent caches is disabled
+ by default because it is a very expensive operation that can block a thread for
+ several minutes on larger installations.
+
+ Installations that still want to use this metric must explicitly enable it with the
+ [cache.enableDiskStatMetrics](http://gerrit-documentation.storage.googleapis.com/Documentation/2.16.18/config-gerrit.html#cache.enableDiskStatMetrics)
+ configuration option.
+
### 3.0.8
* Breaking Changes
diff --git a/pages/site/releases/3.1.md b/pages/site/releases/3.1.md
index ad4a353..c8150cc 100644
--- a/pages/site/releases/3.1.md
+++ b/pages/site/releases/3.1.md
@@ -292,6 +292,20 @@
## Bugfix Releases
+### 3.1.5
+
+* Breaking Changes
+
+ * Metrics: Cache disk stat metric computation is disabled by default
+
+ Calculation of the cache disks stat metrics for persistent caches is disabled
+ by default because it is a very expensive operation that can block a thread for
+ several minutes on larger installations.
+
+ Installations that still want to use this metric must explicitly enable it with the
+ [cache.enableDiskStatMetrics](http://gerrit-documentation.storage.googleapis.com/Documentation/2.16.18/config-gerrit.html#cache.enableDiskStatMetrics)
+ configuration option.
+
### 3.1.4
* Breaking Changes
