Add Gerrit 3.3.8 release notes

Change-Id: Icfd60107c46eaf74b899d49fa5700245dd038b90
diff --git a/pages/site/releases/3.3.md b/pages/site/releases/3.3.md
index 2c17e17..da50a9f 100644
--- a/pages/site/releases/3.3.md
+++ b/pages/site/releases/3.3.md
@@ -6,7 +6,8 @@
 toc: true
 ---
 
-Download: **[3.3.7](https://gerrit-releases.storage.googleapis.com/gerrit-3.3.7.war)**
+Download: **[3.3.8](https://gerrit-releases.storage.googleapis.com/gerrit-3.3.8.war)**
+| [3.3.7](https://gerrit-releases.storage.googleapis.com/gerrit-3.3.7.war)
 | [3.3.6](https://gerrit-releases.storage.googleapis.com/gerrit-3.3.6.war)
 | [3.3.5](https://gerrit-releases.storage.googleapis.com/gerrit-3.3.5.war)
 | [3.3.4](https://gerrit-releases.storage.googleapis.com/gerrit-3.3.4.war)
@@ -15,7 +16,8 @@
 | [3.3.1](https://gerrit-releases.storage.googleapis.com/gerrit-3.3.1.war)
 | [3.3.0](https://gerrit-releases.storage.googleapis.com/gerrit-3.3.0.war)
 
-Documentation: **[3.3.7](https://gerrit-documentation.storage.googleapis.com/Documentation/3.3.7/index.html)**
+Documentation: **[3.3.8](https://gerrit-documentation.storage.googleapis.com/Documentation/3.3.8/index.html)**
+| [3.3.7](https://gerrit-documentation.storage.googleapis.com/Documentation/3.3.7/index.html)
 | [3.3.6](https://gerrit-documentation.storage.googleapis.com/Documentation/3.3.6/index.html)
 | [3.3.5](https://gerrit-documentation.storage.googleapis.com/Documentation/3.3.5/index.html)
 | [3.3.4](https://gerrit-documentation.storage.googleapis.com/Documentation/3.3.4/index.html)
@@ -514,6 +516,70 @@
 
 ## Bugfix releases
 
+### 3.3.8
+
+* New features
+
+  * [Change 324095](https://gerrit-review.googlesource.com/324095):
+  Display cache statistics after reindex operation.
+
+     Help analyzing the cache utilization during reindex command
+     and provide insight into sizing them for optimal performance.
+
+  * [Change 323786](ttps://gerrit-review.googlesource.com/323786):
+  Allow context-dependent group suggestions in gr-permission.
+
+* Reindexing performance improvements
+
+  * [Change 322935](https://gerrit-review.googlesource.com/322935):
+  Fix buggy Index-Interactive Executor.
+
+     Fix index.threads when set to a negative value which was not using a
+     direct executor as mentioned in docs.
+
+  * [Change 323215](https://gerrit-review.googlesource.com/323215)
+    [Change 322296](https://gerrit-review.googlesource.com/322296):
+  Disable auto flushing during offline Lucene indexing.
+
+  * [Change 322835](https://gerrit-review.googlesource.com/322835):
+  Use thread count specified on offline reindex command line.
+
+    Honor the "--threads" command line option when provided instead of
+    batchThreads property from `gerrit.config`.
+
+  * [Change 323396](https://gerrit-review.googlesource.com/323396):
+  Avoid lucene index deletes during offline reindexing.
+
+  * [Change 324115](https://gerrit-review.googlesource.com/324115):
+  Avoid double indexing work during project reindexing.
+
+* Bug Fixes
+
+ * [Issue 14963](https://crbug.com/gerrit/14963):
+  Fix /access REST APIs returning incorrect rule when group is duplicated for same rule.
+
+  * [Issue 14097](https://crbug.com/gerrit/14097):
+  Fix GC action not shown in project commands with Gerrit in multi-site configuration.
+
+  * [Issue 15293](https://crbug.com/gerrit/15293):
+  Fix fetch of group suggestions for projects with a `/` in their name.
+
+  * [Issue 15251](https://crbug.com/gerrit/15251):
+  Ensure that user without edit permission can't change plugin configuration.
+
+  * [Change 313561](https://gerrit-review.googlesource.com/313561):
+  Handle null account-ids when sending e-mails.
+
+  * [Change 307602](https://gerrit-review.googlesource.com/307602):
+  Fix NPE while accessing draft refs.
+
+  * [Change 307482](https://gerrit-review.googlesource.com/307482):
+  EqualsLabelPredicate: fix bug that prevents matching owner votes.
+
+  * [Change 323255](https://gerrit-review.googlesource.com/323255):
+  Skip creating slices for projects with no changes during changes off-line reindexing
+  so that empty slices are no longer included in the slice count.
+
 ### 3.3.7
 
 * New Features