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https://issues.apache.org/jira/browse/LUCENE-8671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16809947#comment-16809947
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ASF subversion and git services commented on LUCENE-8671:
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Commit 1ec229b604dec73649949a94d072f202b5b1eab0 in lucene-solr's branch
refs/heads/master from Simon Willnauer
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=1ec229b ]
LUCENE-8671: Expose FST off/on-heap options on Lucene50PostingsFormat (#613)
Before we can expose options to configure this postings format
on a per-reader basis we need to expose the option to load the terms
index FST off or on heap on the postings format. This already allows to
change the default in a per-field posting format if an expert user
wants to change the defaults. This essentially provides the ability to change
defaults globally while still involving some glue code.
> 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
> Time Spent: 3h 40m
> Remaining Estimate: 20h 20m
>
> 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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