The differences lie in Lucene.
Instead of thinking of phrase queries as slow, think of term queries as fast :-)
Phrase queries need to read and consider position information that
term queries do not.
-Yonik
On 10/26/07, Haishan Chen <[EMAIL PROTECTED]> wrote:
> I am a new Solr user and wonder if anyone can help me these questions. I used
> Solr to index about two million documents and query on it using standard
> request handler. I disabled all cache. I found phrase query was substantially
> slower than the usual query. The statistic I collected is as following. I
> was doing the query on the one field only. content:(auto repair)
> 47 ms repeatablecontent:("auto repair") 937 ms
> repeatablecontent:("auto repair"~10000) 766 ms repeatable What are the
> factors affecting phrase query performance? How come the phrase query
> content:("auto repair") is almost 20 times slower than content:(auto repair)?
> I also notice a the phrase query with a slop is always faster than the one
> without a slop. Is the difference I observe here a performance problem of
> Lucene or Solr?
>
> It will be appreciated if anyone can help
