Few last filebeat statistic strings:
2017-11-10T13:40:12Z INFO Non-zero metrics in the last 1m0s: filebeat.harvester.open_files=1 filebeat.harvester.running=1 filebeat.harvester.started=1 libbeat.logstash.call_count.PublishEvents=21 libbeat.logstash.publish.read_bytes=126 libbeat.logstash.publish.write_bytes=6709789 libbeat.logstash.published_and_acked_events=42844 libbeat.publisher.published_events=42839 publish.events=43008 registrar.states.update=43008 registrar.writes=21
2017-11-10T13:41:12Z INFO Non-zero metrics in the last 1m0s: libbeat.logstash.call_count.PublishEvents=17 libbeat.logstash.publish.read_bytes=102 libbeat.logstash.publish.write_bytes=5347797 libbeat.logstash.published_and_acked_events=34679 libbeat.publisher.published_events=34680 publish.events=34816 registrar.states.update=34350 registrar.writes=16
2017-11-10T13:42:12Z INFO Non-zero metrics in the last 1m0s: libbeat.logstash.call_count.PublishEvents=15 libbeat.logstash.publish.read_bytes=90 libbeat.logstash.publish.write_bytes=4783812 libbeat.logstash.published_and_acked_events=30517 libbeat.publisher.published_events=30512 publish.events=30720 registrar.states.update=31186 registrar.writes=16