Elasticsearch PIT 与 search_after 深分页稳定查询实践

打开 PIT：POST /products/_pit?keep_alive=1m 首次查询（不含 search_after）：POST /_search { "pit": { "id": "<PIT_ID>", "keep_alive": "1m" }, "size": 50, "sort": [ { "price": "asc" }, { "_shard_doc": "asc" } ], "query": { "term": { "category": "electronics" } } } 后续查询（携带上一页最后一条的 sort 值）：POST /_search { "pit": { "id": "<PIT_ID>", "keep_alive": "1m" }, "size": 50, "sort": [ { "price": "asc" }, { "_shard_doc": "asc" } ], "search_after": [ 123.45, "g1AAAAB..." ], "query": { "term": { "category": "electronics" } } } 关闭 PIT：DELETE /_pit { "pit_id": "<PIT_ID>" }