SONAR-7417 add sonar.ce.workerCount to sonar.properties

sonar-application/src/main/assembly/conf/sonar.properties

@@ -194,6 +194,21 @@
 #sonar.ajp.port=-1
 
 
+#--------------------------------------------------------------------------------------------------
+# COMPUTE ENGINE
+# The Compute Engine is responsible for processing background tasks.
+
+# The number of workers in the Compute Engine.
+# Use the following property to configure 1 or more workers. Value must be >= 1. Default value is 1.
+# By default the Compute Engine uses a single worker and therefor processes tasks one at a time.
+#    Recommendations:
+#
+#    Using N workers will requires N times as much Heap memory of the WebServer (see property
+#    sonar.web.javaOpts to tune heap) and produce N times as much IOs on disk, database and
+#    ElasticSearch. The number of workers must suit your environment.
+#sonar.ce.workerCount=1
+
+
 #--------------------------------------------------------------------------------------------------
 # ELASTICSEARCH
 # Elasticsearch is used to facilitate fast and accurate information retrieval.