What’s the means about this params in the metricbeat log file?

Elastic Stack Beats
5

@kvch
My metricbeat version is 5.6.2, and here's a passage of my metricbeat log:


2017-11-24T19:38:46+08:00 INFO Non-zero metrics in the last 5m0s:
 fetches.redis-info.events=5 
fetches.redis-info.success=5 
fetches.system-core.events=40 
fetches.system-core.success=5 
fetches.system-cpu.events=5 
fetches.system-cpu.success=5 
fetches.system-diskio.events=4 
fetches.system-diskio.success=1 
fetches.system-load.events=5 
fetches.system-load.success=5 
fetches.system-memory.events=5 
fetches.system-memory.success=5 
fetches.system-network.events=610 
fetches.system-network.success=5 
fetches.system-process.events=53 
fetches.system-process.success=1 
libbeat.es.call_count.PublishEvents=5 
libbeat.es.publish.read_bytes=5071 
libbeat.es.publish.read_errors=5 
libbeat.es.publish.write_bytes=55089 
libbeat.es.published_and_acked_events=727 
libbeat.publisher.messages_in_worker_queues=727 
libbeat.publisher.published_events=727

thanks.