# Updating index analyzer with html char strip filter - blocking?

**URL:** <https://discuss.elastic.co/t/updating-index-analyzer-with-html-char-strip-filter-blocking/263182>\
**Category:** Elasticsearch\
**Created:** [February 4, 2021, 12:03am UTC](https://discuss.elastic.co/t/updating-index-analyzer-with-html-char-strip-filter-blocking/263182 "2021-02-04T00:03:07Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![barry2](https://avatars.discourse-cdn.com/v4/letter/b/d9b06d/32.png) [@barry2](https://discuss.elastic.co/u/barry2)\
**Post date:** [February 4, 2021, 12:03am UTC](https://discuss.elastic.co/t/updating-index-analyzer-with-html-char-strip-filter-blocking/263182/1 "2021-02-04T00:03:08Z")

</div>

Hello, I have an index with around 11,000,000 documents in it. I need to update the index analyzer to include a html strip character filter.

I know I have to close the index first, apply the new analyzer, then open the index, but I'm wondering what the actual downtime will be for this process.

When I re-open the index after applying the new analyzer, will all 11,000,000 documents need to be re-indexed? Will this be a blocking operation or cause spikes in resource usage?

Or are there any other alternatives, could I just add the html strip char filter to a search analyzer with the same effect but without having to close/re-open the index?

Thanks.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 4, 2021, 12:03am UTC](https://discuss.elastic.co/t/updating-index-analyzer-with-html-char-strip-filter-blocking/263182/2 "2021-03-04T00:03:25Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.