_cat/indices?format=json&index='*log*'
哪个索引的文件数最多？GET /_cat/indices?v&s=docs.count:desc
哪些索引状态是 yellow ？GET /_cat/indices?v&health=yellow
指定显示哪些列GET /_cat/indices/twitter?pri&v&h=health,index,pri,rep,docs.count,mt
每一个索引使用了多少内存？GET /_cat/indices?v&h=i,tm&s=tm:desc
参数解释GET _cat/indices?help