# Bootstrap.mlockall property **URL:** \ **Category:** Elasticsearch\ **Created:** [June 25, 2015, 7:39am UTC](https://discuss.elastic.co/t/bootstrap-mlockall-property/24309 "2015-06-25T07:39:43Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![sohilelasticsearch](https://avatars.discourse-cdn.com/v4/letter/s/ecc23a/32.png) [@sohilelasticsearch](https://discuss.elastic.co/u/sohilelasticsearch)\ **Post date:** [June 25, 2015, 7:39am UTC](https://discuss.elastic.co/t/bootstrap-mlockall-property/24309/1 "2015-06-25T07:39:43Z")
Hi All, Is it good to set **bootstrap.mlockall: true** on production environment? Thanks, Sohil ---
**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\ **Post date:** [June 25, 2015, 7:45am UTC](https://discuss.elastic.co/t/bootstrap-mlockall-property/24309/2 "2015-06-25T07:45:49Z")
Perhaps [https://www.elastic.co/guide/en/elasticsearch/guide/current/heap-sizing.html#\_swapping\_is\_the\_death\_of\_performance](https://www.elastic.co/guide/en/elasticsearch/guide/current/heap-sizing.html#_swapping_is_the_death_of_performance) is helpful? ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [June 25, 2015, 10:50am UTC](https://discuss.elastic.co/t/bootstrap-mlockall-property/24309/3 "2015-06-25T10:50:06Z")
It's good irrespective of the environment you run. ---
**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, 12:05am UTC](https://discuss.elastic.co/t/bootstrap-mlockall-property/24309/4 "2017-07-06T00:05:27Z")