我在使用Elasticsearch進行search查詢的過程中，出現了Result window is too large問題。
這裡簡單做一個報錯復現：
In [1]: import requests
In [2]: requests.get(`http://127.0.0.1:9200/cmdb-now/_search?page=1&size=10000000`).json()
Out[2]:
{
u`error`: {
u`failed_shards`: [
{
u`index`: u`cmdb-now`,
u`node`: u`ldeZMZRAR6uZpAiIr5QxBQ`,
u`reason`: {
u`reason`: u`Result window is too large, from + size must be less than or equal to: [10000] but was [10000000]. 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.`,
u`type`: u`query_phase_execution_exception`
},
u`shard`: 0
}
],
u`grouped`: True,
u`phase`: u`query`,
u`reason`: u`all shards failed`,
u`root_cause`: [
{
u`reason`: u`Result window is too large, from + size must be less than or equal to: [10000] but was [10000000]. 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.`,
u`type`: u`query_phase_execution_exception`
}
],
u`type`: u`search_phase_execution_exception`
},
u`status`: 500
}
從上面的報錯資訊，可以看到ES提示我結果視窗太大了，目前最大值為10000，而我卻要求給我10000000。並且在後面也提到了要求我修改index.max_result_window引數來增大結果視窗大小。
我google了修改方法，命令如下：
curl -XPUT http://127.0.0.1:9200/cmdb-now/_settings -d `{ "index" : { "max_result_window" : 100000000}}`
需要注意的是，cmdb-now這裡是我ES索引的名字，因此你需要它替換成你對應的索引名稱進行修改。
有關官方針對index的相關配置介紹，可以點選這裡進行檢視。