# Elasticsearch groovy script execution

**URL:** <https://discuss.elastic.co/t/elasticsearch-groovy-script-execution/45140>\
**Category:** Elasticsearch\
**Created:** [March 22, 2016, 5:31pm UTC](https://discuss.elastic.co/t/elasticsearch-groovy-script-execution/45140 "2016-03-22T17:31:28Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![George](https://avatars.discourse-cdn.com/v4/letter/g/71e660/32.png) [@George](https://discuss.elastic.co/u/George)\
**Post date:** [March 22, 2016, 5:31pm UTC](https://discuss.elastic.co/t/elasticsearch-groovy-script-execution/45140/1 "2016-03-22T17:31:28Z")

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Hello everybody,

I'm using groovy scripts via the es update API to update some existing document in es.  
Can somebody tell me how the groovy script is executed? i.e. in a separate java process, or in the process which runs es node?

I'm talking about es 2.x.

Thanks!

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**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:** [March 25, 2016, 3:36pm UTC](https://discuss.elastic.co/t/elasticsearch-groovy-script-execution/45140/2 "2016-03-25T15:36:10Z")

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The Groovy script is run inside the ES process. Running a separate process for it would be prohibitively expensive.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 11:05pm UTC](https://discuss.elastic.co/t/elasticsearch-groovy-script-execution/45140/3 "2017-07-05T23:05:06Z")

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