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Date: Wed, 21 Feb 2007 11:46:08 -0800 (PST)
From: "Karl Wettin (JIRA)" <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Updated: (LUCENE-769) [PATCH] Performance improvement for
 some cases of sorted search
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     [ https://issues.apache.org/jira/browse/LUCENE-769?page=3Dcom.atlassia=
n.jira.plugin.system.issuetabpanels:all-tabpanel ]

Karl Wettin updated LUCENE-769:
-------------------------------

    Attachment:     (was: selfContained.patch)

> [PATCH] Performance improvement for some cases of sorted search
> ---------------------------------------------------------------
>
>                 Key: LUCENE-769
>                 URL: https://issues.apache.org/jira/browse/LUCENE-769
>             Project: Lucene - Java
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: Artem Vasiliev
>         Attachments: selfContained.patch
>
>
> The attachment =E2=84=965 from 31 Jan is the last and the whole patch for=
 this issue. Guys with permissions, please remove all the others.
> It's a small addition to Lucene that significantly lowers memory consumpt=
ion and improves performance for sorted searches with frequent index update=
s and relatively big indexes (>1mln docs) scenario. This solution supports =
only single-field sorting currently (which seem to be quite popular use cas=
e). Multiple fields support can be added without much trouble.
> The solution is this: documents from the sorting set (instead of given fi=
eld's values from the whole index - current FieldCache approach) are cached=
 in a WeakHashMap so the cached items are candidates for GC.  Their fields =
values are then fetched from the cache and compared while sorting.

--=20
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