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https://issues.apache.org/jira/browse/LUCENE-9969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17419737#comment-17419737
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Michael McCandless commented on LUCENE-9969:
--------------------------------------------

Yeah big +1 to experimenting with that!  It's crazy that the taxo index stores 
ordinals as token positions today, because it very much predated Lucene's doc 
values.

> DirectoryTaxonomyReader.taxoArray占用内存较大导致系统OOM宕机
> ------------------------------------------------
>
>                 Key: LUCENE-9969
>                 URL: https://issues.apache.org/jira/browse/LUCENE-9969
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/facet
>    Affects Versions: 6.6.2
>            Reporter: FengFeng Cheng
>            Priority: Trivial
>         Attachments: image-2021-05-24-13-43-43-289.png
>
>          Time Spent: 1h 10m
>  Remaining Estimate: 0h
>
> 首先数据量很大,jvm内存为90G,但是TaxonomyIndexArrays几乎占走了一半
> !image-2021-05-24-13-43-43-289.png!
> 请问对于TaxonomyReader是否有更好的使用方式或者其他的优化?



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