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https://issues.apache.org/jira/browse/LUCENE-8671?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ankit Jain updated LUCENE-8671:
-------------------------------
    Attachment: offheap_generic_settings.patch

> Add setting for moving FST offheap/onheap
> -----------------------------------------
>
>                 Key: LUCENE-8671
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8671
>             Project: Lucene - Core
>          Issue Type: New Feature
>          Components: core/FSTs, core/store
>            Reporter: Ankit Jain
>            Priority: Minor
>         Attachments: offheap_generic_settings.patch, offheap_settings.patch
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> While LUCENE-8635, adds support for loading FST offheap using mmap, users do 
> not have the  flexibility to specify fields for which FST needs to be 
> offheap. This allows users to tune heap usage as per their workload.
> Ideal way will be to add an attribute to FieldInfo, where we have 
> put/getAttribute. Then FieldReader can inspect the FieldInfo and pass the 
> appropriate On/OffHeapStore when creating its FST. It can support special 
> keywords like ALL/NONE.



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