# Percolation questions

**URL:** <https://discuss.elastic.co/t/percolation-questions/19604>\
**Category:** Elasticsearch\
**Created:** [September 3, 2014, 7:22pm UTC](https://discuss.elastic.co/t/percolation-questions/19604 "2014-09-03T19:22:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![IronMike](https://avatars.discourse-cdn.com/v4/letter/i/e9a140/32.png) [@IronMike](https://discuss.elastic.co/u/IronMike)\
**Post date:** [September 3, 2014, 7:22pm UTC](https://discuss.elastic.co/t/percolation-questions/19604/1 "2014-09-03T19:22:30Z")

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I have couple of questions on percolation:  
Quick preview to my system: I am using Java transport client/Bulk Processor  
to index about 5 million docs to index that lives on AWS cluster. Our  
webapp interacts with index for searches.

I would like for the users using our webapp to receive alerts/notification  
whenever there is a match against the users "stored searches" or interests  
if you will. So, I feel percolation is what I need. The questions I am not  
sure about yet:

- If I have 1000 users, does this mean I need to register 1000 different  
percolators?
- Can I percolate while indexing/updating index? A common use case for us  
would be that docs change daily, I would like to be able percolate right  
then and there when indexing new doc. Can this be done from Java  
API/transport client? is there an example somewhere?

Thanks

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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 6, 2017, 1:04am UTC](https://discuss.elastic.co/t/percolation-questions/19604/2 "2017-07-06T01:04:33Z")

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