A little more data, of the 3330 files in the index, 2173 are CFS files and 
average 120k.  Another 1116 files are .del's and average about 4kB.  The 
remaining .prx, .frq, etc. consists of 41 files and total only 101MB.  The 
largest files are 3 .prx files which total less than 60MB and 2 .frq of about 
10MB each.

I also noticed that some of the cfs and the del files date back to July of last 
year (probably the last time we did a full reindexed the system).  I would have 
thought running an optimization (which we do on a daily basis) would have 
gotten rid of them.  I know optimization has changed since 1.4, but does it not 
merge all of the various files into a few files?

-----Original Message-----
From: Scott Smith [mailto:ssm...@mainstreamdata.com] 
Sent: Friday, March 15, 2013 4:15 PM
To: java-user@lucene.apache.org
Subject: Lucene slow performance

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.

Scott



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