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Posted to dev@lucene.apache.org by "Max Schmidt (JIRA)" <ji...@apache.org> on 2013/01/22 15:44:13 UTC

[jira] [Commented] (SOLR-2968) Hunspell very high memory use when loading dictionary

    [ https://issues.apache.org/jira/browse/SOLR-2968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13559680#comment-13559680 ] 

Max Schmidt commented on SOLR-2968:
-----------------------------------

Dictionaries with the same file location should be shared across all field and all indexes. This would minimize the problem if you're using multiple indexes. 

Currently I can't use Solr because I have 10 indexes with 5 field and for each field a DictionaryCompoundWordTokenFilterFactory is assigned. So the dictionary will be loaded 50 times. This is too much for my RAM.
                
> Hunspell very high memory use when loading dictionary
> -----------------------------------------------------
>
>                 Key: SOLR-2968
>                 URL: https://issues.apache.org/jira/browse/SOLR-2968
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 3.5
>            Reporter: Maciej Lisiewski
>            Priority: Minor
>         Attachments: patch.txt
>
>
> Hunspell stemmer requires gigantic (for the task) amounts of memory to load dictionary/rules files. 
> For example loading a 4.5 MB polish dictionary (with empty index!) will cause whole core to crash with various out of memory errors unless you set max heap size close to 2GB or more.
> By comparison Stempel using the same dictionary file works just fine with 1/8 of that (and possibly lower values as well).
> Sample error log entries:
> http://pastebin.com/fSrdd5W1
> http://pastebin.com/Lmi0re7Z

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