SpiderMan.ets_stats

You're seeing just the function ets_stats, go back to SpiderMan module for more information.
Link to this function

ets_stats(spider)

Specs

ets_stats(spider()) :: [
  common_pipeline_tid: ets_stats(),
  downloader_tid: ets_stats(),
  failed_tid: ets_stats(),
  spider_tid: ets_stats(),
  item_processor_tid: ets_stats()
]

fetch spider's statistics of all ets