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From "Chris Male (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3443) Optimize hunspell dictionary loading with multiple cores
Date Mon, 07 May 2012 13:34:57 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13269607#comment-13269607
] 

Chris Male commented on SOLR-3443:
----------------------------------

Good suggestion Luca, this is a good way to save some memory.  With LUCENE-2510 I'm going
to move all the analysis factories into the analysis module so we will need a way that we
can share across multiple Factory instances, not just Solr cores.
                
> Optimize hunspell dictionary loading with multiple cores
> --------------------------------------------------------
>
>                 Key: SOLR-3443
>                 URL: https://issues.apache.org/jira/browse/SOLR-3443
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Luca Cavanna
>
> The Hunspell dictionary is actually loaded into memory. Each core using hunspell loads
its own dictionary, no matter if all the cores are using the same dictionary files. As a result,
the same dictionary is loaded into memory multiple times, once for each core. I think we should
share those dictionaries between all cores in order to optimize the memory usage. In fact,
let's say a dictionary takes 20MB into memory (this is what I detected), if you have 20 cores
you are going to use 400MB only for dictionaries, which doesn't seem a good idea to me.

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