This is pretty typical. The first query is always more expensive, as
Lucene lazily loads some pieces of the index into memory and you may
see the FieldCache in action, depending on sorting, not to mention you
are also seeing operating system caching take place.
Is there some reason you don't want these or are you just trying to
understand the why?
-Grant
On Oct 10, 2008, at 6:25 PM, Sammy Yu wrote:
Hi,
I'm using SOLR 1.3 on a index with approximately 8 million
documents. I would like to disable SOLR's cache so that it is easier
for me to test the scenario when there is a small likelihood of cache
hits. I've disabled caching by commenting out the filterCache,
queryResultCache, and documentCache section in solrconfig.xml as
suggested by the Wiki. It seems disabled because the admin interface
no longer shows any entries in the Cache section.
However, it appears that there is still some sort caching taking
place. The first time I make specific query it would take around 100
msec, subsequent queries would take around 15 msec. Is there some
sort of caching happening at Lucene level?
Thanks for your help,
Sammy Yu
--------------------------
Grant Ingersoll
Lucene Boot Camp Training Nov. 3-4, 2008, ApacheCon US New Orleans.
http://www.lucenebootcamp.com
Lucene Helpful Hints:
http://wiki.apache.org/lucene-java/BasicsOfPerformance
http://wiki.apache.org/lucene-java/LuceneFAQ
