The quick search provides a lot of categories and 3 results per category. Thus we had not many successful searches. Most of the results were doubled in all the categories. So we decided to change the quick search radically. We only provide one category with an advanced search pattern showing 15 results and another category only showing 3 results focussed on user names.
With these changes I nearly find every page I’m searching for.
Top results (15):
__INPUT__ __INPUT__* *__INPUT__ *__INPUT__*
fq=type:DOCUMENT
fq=-space_exact:XWiki*
qf=property.XWiki.TagClass.tags^15.0 spaces^15.0 title^10.0 name^10.0 doccontent^2.0 objcontent^0.4 filename^0.4 attcontent^0.4 doccontentraw^0.4 author_display^0.08 creator_display^0.08 comment^0.016 attauthor_display^0.016
User names (3):
__INPUT__ __INPUT__*
fq=type:DOCUMENT
fq=class:XWiki.XWikiUsers
qf=property.XWiki.XWikiUsers.last_name^10 property.XWiki.XWikiUsers.first_name^5 name^2.5 object.XWiki.XWikiUsers
fq=wiki:xwiki