Re: potential query performance issue

2013-03-16 Thread Lin Ma
Thanks Lukai for the detailed reply, - "If you query is too long, it might not very efficient in query evaluation process. " -- how does Lucene query evaluation works? Is there any document to refer to? - "you can read out payload of the match term you have stored" -- what do you me

Re: potential query performance issue

2013-03-15 Thread Lin Ma
Hi lukai, thanks for the reply. Do you mean WAND is a way to resolve this issue? For "native support", do you mean there is no built-in (existing ready to use externally open source) module in Lucene to implement WAND? If so, the performance will really be bad. regards, Lin On Sat, Mar 16, 2013 a

Re: potential query performance issue

2013-03-15 Thread lukai
I had implemented wand with solr/lucene. So far there is no performance issue. There is no native support for this functionality, you need to implement it by yourself.. On Fri, Mar 15, 2013 at 10:09 AM, Lin Ma wrote: > Hello guys, > > Supposing I have one million documents, and each document ha

potential query performance issue

2013-03-15 Thread Lin Ma
Hello guys, Supposing I have one million documents, and each document has hundreds of features. For a given query, it also has hundreds of features. I want to fetch most relevant top 1000 documents by dot product related features of query and documents (query/document features are in the same feat