18 sep 2007 kl. 08.33 skrev Shailendra Mudgal:
Whether it caches frequently used terms ?
I don't understand you question?
--
karl
On 9/18/07, Karl Wettin <[EMAIL PROTECTED]> wrote:
18 sep 2007 kl. 07.12 skrev Shailendra Mudgal:
What my goal is to understand the caching strategy. How well this
work for repetitive queries. Is there any room available to improve
this.
It is usually a loss of resources to cache results in a busy system
with gaussianity distributed queries. There is a paragraph on the
wiki <http://wiki.apache.org/lucene-java/LuceneCaveats> that explains
this: Lucene is amazingly fast at searching. Rather than caching hits
and paging through them, merely re-executing the query is often fast
enough.
I have conducted experiements with active results cache at index
update time, soft/weak references and some other things I can't think
of right now. Most of the time it ended up with the garbage collector
going crazy with zillions of tiny soft/weak referenced instances,
clock ticks spent updating results people don't that much, et c. You
really need a lot of repetative queries in order for such a cache to
do any good.
If you are retrieving a lot of stored fields it might make sense to
cache documents that are frequently accessed.
--
karl
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