Thanks  for the reply! 
 
In my test case , I start loadrunner jsut test for 5 minute,and the response 
growth slowly.the TPS(transactions per second) seems stoped at 10 finally.
I will run a test for a longer time again.
In addition,does lucene has bottleneck about the number of documents or index 
size..?
 
> Date: Tue, 10 Jun 2008 16:34:17 +0200> From: [EMAIL PROTECTED]> Subject: Re: 
> The performance of lucene searching(web entironment) test> To: 
> java-user@lucene.apache.org> > On Tue, 2008-06-10 at 21:11 +0800, lutan 
> wrote:> > [A lot of text with code and no newlines, making it very hard to 
> read]> > In your test you're reusing the searcher. For each search your 
> program> performs, you will see faster response times, until the searcher is> 
> fully warmed.> > If your production-system, you re-open your searcher every 
> time and do> not have the benefit of a warmed searcher.> > So yes, Singleton 
> searcher helps, as opposed to opening a searcher for> every search. Try 
> making a test where the only thing you do is open a> searcher 100 times and 
> you will see that it takes a non-trivial amount> of time.> > > > 
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