Merge "Support configuring Monasca Persister performance"

ansible/roles/monasca/defaults/main.yml

@@ -145,6 +145,7 @@ monasca_periodic_notifications_period: 60
 # the total number of threads across all instances of a service does not
 # exceed the Kafka topic partition count.
 monasca_log_pipeline_threads: 2
+monasca_metric_pipeline_threads: 2
 
 ####################
 # Docker

ansible/roles/monasca/templates/monasca-persister/persister.conf.j2

@@ -17,7 +17,7 @@ num_processors = 1
 [kafka_metrics]
 uri = {{ monasca_kafka_servers }}
 topic = {{ monasca_metrics_topic }}
-num_processors = 1
+num_processors = {{ monasca_metric_pipeline_threads }}
 
 [zookeeper]
 uri = {{ monasca_zookeeper_servers }}