Document numberOfSubscribers configuration
Change-Id: I628ef861beab19283be324a8596090308f801b36
diff --git a/src/main/resources/Documentation/config.md b/src/main/resources/Documentation/config.md
index 0ec8e2a..5008888 100644
--- a/src/main/resources/Documentation/config.md
+++ b/src/main/resources/Documentation/config.md
@@ -44,6 +44,14 @@
: Polling interval in msec for receiving messages from Kafka topic subscription.
Default: 1000
+`plugin.@PLUGIN@.numberOfSubscribers`
+: The number of consumers that are expected to be executed. This number will
+ be used to allocate a thread pool of a suitable size.
+ Default to `6`. This is to allow enough resources to consume all relevant
+ gerrit topics in a multi-site deployment: `batchIndexEventTopic`
+ `streamEventTopic`, `gerritTopic`, `projectListEventTopic`,
+ `cacheEventTopic`, `indexEventTopic`
+
`plugin.@PLUGIN@.sendAsync`
: Send messages to Kafka asynchronously, detaching the calling process from the
acknowledge of the message being sent.
