# Why optimize is not executed on all shards? **URL:** \ **Category:** Elasticsearch\ **Created:** [June 5, 2013, 5:18am UTC](https://discuss.elastic.co/t/why-optimize-is-not-executed-on-all-shards/12274 "2013-06-05T05:18:07Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Jun\_Liu](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jun\_Liu](https://discuss.elastic.co/u/Jun_Liu)\ **Post date:** [June 5, 2013, 5:18am UTC](https://discuss.elastic.co/t/why-optimize-is-not-executed-on-all-shards/12274/1 "2013-06-05T05:18:07Z")
I tried to execute optimize operation to one index: curl -XPOST ' [http://192.168.2.105:9200/user/\_optimize?max\_num\_segments=5&pretty=true](http://192.168.2.105:9200/user/_optimize?max_num_segments=5&pretty=true)[http://192.168.2.105:9200/weibo\_user\_v1/\_optimize?pretty=true](http://192.168.2.105:9200/weibo_user_v1/_optimize?pretty=true) ' { "ok" : true, "\_shards" : { "total" : 10, "successful" : 6, "failed" : 0 } Why only 6 shards are successful? (The index has 5 shards and 1 replica) -- 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). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**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, 2:32am UTC](https://discuss.elastic.co/t/why-optimize-is-not-executed-on-all-shards/12274/2 "2017-07-06T02:32:53Z")