Add config option to disable online reindexing
Change-Id: I18c48008778df86355a0bd57977e13e080f5fc90
diff --git a/Documentation/config-gerrit.txt b/Documentation/config-gerrit.txt
index c93a01b..9fd0db2 100644
--- a/Documentation/config-gerrit.txt
+++ b/Documentation/config-gerrit.txt
@@ -2176,6 +2176,18 @@
thread pool as interactive operations (unless
link:#changeMerge.threadPoolSize[changeMerge.threadPoolSize] is set).
+[[index.onlineUpgrade]]index.onlineUpgrade::
++
+Whether to upgrade to new index schema versions while the server is
+running. This is recommended as it prevents additional downtime during
+Gerrit version upgrades (avoiding the need for an offline reindex step
+using Reindex), but can add additional server load during the upgrade.
++
+If set to false, there is no way to upgrade the index schema to take
+advantage of new search features without restarting the server.
++
+Defaults to true.
+
==== Lucene configuration
Open and closed changes are indexed in separate indexes named
