Highlighting is complex and more hacky than you'd imagine at first glance.
Each highlighter is different and we can't tell which one you are using
without seeing your mapping. For the plain highlighter the cost is roughly
proportional to the length of the highlighted field. So in your case its
the cost to reanalyze every one of those pages.
You could return which page is matched pretty cheaply if you were willing
to write a plugin. Especially if you just wanted to know the first page or
something.
You could try using explain if you searched for text_content_*. That'd
tell you which field matched.
Nik
On Jan 18, 2015 6:21 PM, "Karol Sikora" <sicarr...@gmail.com> wrote:
> Hi all,
>
> I have some specific requirements for highlighting. I need to search in
> full content of item for phrase, and then show on which page searched
> phrase is occuring. So i've created one field named text_content and fields
> named text_content_{page_number} (text_content_1, text_content_2, etc.).
> Example query is:
> {
> "highlight": {
> "fields": {
> "text_content_*": {}
> }
> },
> "query": {
> "match": {
> "text_content": "lorem"
> }
> },
> "size": 40
> }
>
> I've noticed that this query is fast, but only if i have small number of
> documents in index. Quiering for documents is always fast (<40ms), but
> highlight phase time is growing when number of documents in index is
> growing.
> I've stared thinking that highlighting may be processed before appending
> "size": 40 - on the all matched documents. It's correct? How can in speed
> up such case?
>
> Regards,
> Karol
>
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