# Update mappings takes 30 hours for 9M documents **URL:** \ **Category:** Elasticsearch\ **Created:** [January 20, 2020, 9:20am UTC](https://discuss.elastic.co/t/update-mappings-takes-30-hours-for-9m-documents/215694 "2020-01-20T09:20:36Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![orenco](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/orenco/32/60137_2.png) [@orenco](https://discuss.elastic.co/u/orenco)\ **Post date:** [January 20, 2020, 9:20am UTC](https://discuss.elastic.co/t/update-mappings-takes-30-hours-for-9m-documents/215694/1 "2020-01-20T09:20:37Z")
I'm using Elastic 2.4 . I'm trying to update mappings, but it takes 30 hours for Elastic with 9M documents. I'm running on a machine with 360 GB RAM, and Elastic is running with 30 GB. 1. Is there a quick option to run the update mappings much faster ? maybe in parallel processes ? 2. Is it possible to read documents from Elastic when update mapping is running ? Thanks ! ---
**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\ **Post date:** [January 20, 2020, 4:50pm UTC](https://discuss.elastic.co/t/update-mappings-takes-30-hours-for-9m-documents/215694/2 "2020-01-20T16:50:31Z")
can you explain, what you mean with update mappings in combination with 9 million documents? Are you talking about updating the mapping or are you talking about indexing documents? Thanks! ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [February 17, 2020, 4:50pm UTC](https://discuss.elastic.co/t/update-mappings-takes-30-hours-for-9m-documents/215694/3 "2020-02-17T16:50:34Z")
Closed on February 17, 2020, 4:50pm UTC This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.