# Specifying document type in search query - performance impact for single shard index **URL:** \ **Category:** Elasticsearch\ **Created:** [November 21, 2014, 3:06pm UTC](https://discuss.elastic.co/t/specifying-document-type-in-search-query-performance-impact-for-single-shard-index/20889 "2014-11-21T15:06:28Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Ajay\_Divakaran](https://avatars.discourse-cdn.com/v4/letter/a/779978/32.png) [@Ajay\_Divakaran](https://discuss.elastic.co/u/Ajay_Divakaran)\ **Post date:** [November 21, 2014, 3:06pm UTC](https://discuss.elastic.co/t/specifying-document-type-in-search-query-performance-impact-for-single-shard-index/20889/1 "2014-11-21T15:06:28Z")
Hi all, If I have an elasticsearch index with a single shard and 0 replicas. Will specifying a document-type part of the match\_all query help in performance (i.e narrowing down the result-set)? i.e '[http://localhost:9200/my-index/my-doc-type/\_search](http://localhost:9200/my-index/my-doc-type/_search) vs '[http://localhost:9200/my-index/\_search](http://localhost:9200/my-index/_search) -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/0c5865dd-6aa7-466b-8006-5a2e3cfef139%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/0c5865dd-6aa7-466b-8006-5a2e3cfef139%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Ajay\_Divakaran](https://avatars.discourse-cdn.com/v4/letter/a/779978/32.png) [@Ajay\_Divakaran](https://discuss.elastic.co/u/Ajay_Divakaran)\ **Post date:** [November 21, 2014, 4:21pm UTC](https://discuss.elastic.co/t/specifying-document-type-in-search-query-performance-impact-for-single-shard-index/20889/2 "2014-11-21T16:21:52Z")
This is what I found from the documentation "When we search for documents of a particular type, Elasticsearch simply uses a filter on the \_type field to restrict results to documents of that type." So it seems the answer is yes. On Friday, November 21, 2014 8:36:28 PM UTC+5:30, Ajay Divakaran wrote: > Hi all, > > If I have an elasticsearch index with a single shard and 0 replicas. Will > specifying a document-type part of the match\_all query help in performance > (i.e narrowing down the result-set)? > > i.e '[http://localhost:9200/my-index/my-doc-type/\_search](http://localhost:9200/my-index/my-doc-type/_search) vs ' > [http://localhost:9200/my-index/\_search](http://localhost:9200/my-index/_search) -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/d32ddedd-8bba-4218-819f-a34fe0cae956%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/d32ddedd-8bba-4218-819f-a34fe0cae956%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 12:48am UTC](https://discuss.elastic.co/t/specifying-document-type-in-search-query-performance-impact-for-single-shard-index/20889/3 "2017-07-06T00:48:24Z")
Closed on July 6, 2017, 12:48am UTC