Here's the code for the writer:
IndexWriterConfig iwc = new IndexWriterConfig(Constants.LUCENE_VERSION,
_analyzer);
LogByteSizeMergePolicy lbsm = new LogByteSizeMergePolicy();
lbsm.setUseCompoundFile(true);
iwc.setMergePolicy(lbsm);
Directory fsDir = FSDirectory.open(new File(_IndexDirectory));
writer = new IndexWriter(fsDir, iwc);
I don't use NRT. I share an IndexReader among the web sessions. However, if
the index has been updated since the last time I used it, I will go get another
reader. For this particular server, the documents are getting updated very
frequently. It would not be "strange" (from the customer's perspective) if a
document received today was updated 10-20 times before the end of the day and
we probably get 2k-3k documents per day.
-----Original Message-----
From: Simon Willnauer [mailto:simon.willna...@gmail.com]
Sent: Friday, March 15, 2013 4:45 PM
To: java-user@lucene.apache.org
Subject: Re: Lucene slow performance
Can you tell us a little more about how you use lucene, how do you index, do
you use NRT or do you open an IndexReader for every request, do you maybe us a
custom merge policy or somthing like this, any special IndexWriter settings?
On Fri, Mar 15, 2013 at 11:15 PM, Scott Smith <ssm...@mainstreamdata.com> wrote:
> We have a system that is using lucene and the searches are very slow. The
> number of documents is fairly small (less than 30,000) and each document is
> typically only 2 to 10 kilo-characters. Yet, searches are taking 15-16
> seconds.
>
> One of the things I noticed was that the index directory has several thousand
> (3000+) .cfs files. We do optimize the index once per day. This is a system
> that probably gets several thousand document deletes and additions per day
> (spread out across the day).
>
> Any thoughts. We didn't really notice this until we went to 4.x.
what do you mean what didn't you notice, the slowness or the CFS files?
simon
>
> Scott
>
>
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