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References: <CD1CA9AE-3EA2-4860-9A77-C03959A3A111@ulfdittmer.com>
Date: Thu, 25 Jun 2009 20:18:00 -0700 (PDT)
From: Otis Gospodnetic <otis_gospodnetic@yahoo.com>
Subject: Re: question about (problem with?) use of FieldCache$StringIndex
To: java-user@lucene.apache.org
In-Reply-To: <CD1CA9AE-3EA2-4860-9A77-C03959A3A111@ulfdittmer.com>
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Ah, the trusted LIA... :)

FieldCache class is used for sorting.  Are you sorting by a few different fields by any chance?

Otis
--
Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch


----- Original Message ----
> From: Ulf Dittmer <ulf@ulfdittmer.com>
> To: java-user@lucene.apache.org
> Sent: Thursday, June 25, 2009 5:13:48 PM
> Subject: question about (problem with?) use of FieldCache$StringIndex
> 
> Hello-
> 
> We're looking at memory issues we're having with a fair-sized web app that uses 
> Lucene for search. While looking at heap dumps, we discovered that there were 3 
> instances of org.apache.lucene.search.FieldCache$StringIndex, each about 110MB 
> in size (out of a total of 1 GB).
> 
> Looking at the javadocs, I'm not real clear what the class does, but it doesn't 
> seem to have any settings one could change. So I'm wondering: Is it normal to 
> have more than one instance of this? Is it necessary? Are there circumstances in 
> which this could be avoided? If we can't avoid it being used: are there ways of 
> making it use less memory?
> 
> Thanks in advance for any clue. The trusted "Lucene In Action" doesn't talk 
> about the class, and our code doesn't use it directly, so I'm a bit stumped.
> 
> Ulf
> 
> 
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