使用elasticsearch做分页查询时，当查询记录超过10000时

使用elasticsearch做分页查询时，当查询记录超过10000时，会报如下错误：

Result window is too large, from + size must be less than or equal to: [10000] but was [10025]. See the scroll api for a more efficient way to request large data sets. This limit can be set by changing the [index.max_result_window] index level parameter.

查阅文档可知，默认只能查询到10000：

index.max_result_window The maximum value of from + size for searches to this index. Defaults to 10000. Search requests take heap memory and time proportional to from + size and this limits that memory. See Scroll or Search After for a more efficient alternative to raising this.

解决方法：

修改一下设置，把这个设置到自己想要的极限即可，我这里设置1000000：

PUT policy_document/_settings { "index":{ "max_result_window":1000000 } }

修改成功后返回：

{ "acknowledged": true }

然后再去查询就可以了。