It is possible to configure the size of context and title.
Go to ..\webapps\ROOT\WEB-INF\relevance.yml and give the size for title and description context as below:
It is possible to increase or decrease the value as per one's requirement. Please make sure to restart SearchBlox after making changes to the relevance.yml file.
By default, you will find the title and context snippet length as below:
The parameters sets a constraint on the document title's length and divides the document title based on the fragment count given. The title and context snippets will vary depending upon the actual length of the document title/content, user's query as so derived in such a way that it would also take content of the document and title into consideration. Hence the changes will not be uniform to all the results. For changes to reflect on the search page, Whenever you update relevance.yml file, make sure you restart Searchblox services then clear and reindex the collections to take effect in the search page.
titleSnippet & contextSnippet settings are more of search page display settings.
titleSnippet - Title snippet total length - Apprx. 100 characters will be displayed in search page for title display.
titleFragments - Max. 3 title fragments as of default limit w.r.t title snippet length defined.
Brief Explanation: Let's say if the titleSnippet value is 100 and the titleFragment is 3 it will return snippet of 100 with 3 chunked fragments.
The same is applicable for contextSnippet configuartion.