http://127.0.0.1:9021/_cat/indices?format=json&index=[索引名称，可使用通配符]
执行后获取到的结果集如下：
[ { "health": "green", "status": "open", "index": "[此处为你的索引名称]", "uuid": "towtsSEnQR6hqOTDDsWdig", "pri": "5", "rep": "1", "docs.count": "25", "docs.deleted": "0", "store.size": "258.4kb", "pri.store.size": "258.4kb" }, { ...... } ]
原文：https://www.cnblogs.com/merely/p/12598008.html