Does field collapsing (with facet) reduce performance?

[Andy <an...@yahoo.com>]

Just wanted to know how efficient field collapsing is. And if there is a performance penalty, how big is it likely to be?

I'm interested in using field collapsing with faceting.

Thanks.


      

Re: Does field collapsing (with facet) reduce performance?

[Andy <an...@yahoo.com>]

I understand that the specific figures differ for everybody.

I just wanted to see if anyone who has used this feature could share their experience. A ballpark figure -- e.g. 50% slowdown or 10 times slower -- would be helpful.


--- On Mon, 1/17/11, Markus Jelsma <ma...@openindex.io> wrote:

> From: Markus Jelsma <ma...@openindex.io>
> Subject: Re: Does field collapsing (with facet) reduce performance?
> To: solr-user@lucene.apache.org
> Cc: "Andy" <an...@yahoo.com>
> Date: Monday, January 17, 2011, 7:27 PM
> There is always CPU and RAM involved
> for every nice component you use. Just 
> how much the penalty is depends completely on your
> hardware, index and type of 
> query. Under heavy load it numbers will change.
> 
> Since we don't know your situation and it's hard to predict
> without 
> benchmarks, you should really do the tests yourself.
> 
> > Just wanted to know how efficient field collapsing is.
> And if there is a
> > performance penalty, how big is it likely to be?
> > 
> > I'm interested in using field collapsing with
> faceting.
> > 
> > Thanks.
> 


      

Re: Does field collapsing (with facet) reduce performance?

[Markus Jelsma <ma...@openindex.io>]

There is always CPU and RAM involved for every nice component you use. Just 
how much the penalty is depends completely on your hardware, index and type of 
query. Under heavy load it numbers will change.

Since we don't know your situation and it's hard to predict without 
benchmarks, you should really do the tests yourself.

> Just wanted to know how efficient field collapsing is. And if there is a
> performance penalty, how big is it likely to be?
> 
> I'm interested in using field collapsing with faceting.
> 
> Thanks.