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https://issues.apache.org/jira/browse/LUCENE-9510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17195525#comment-17195525
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Adrien Grand commented on LUCENE-9510:
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I opened a PR that does a simpler change which consists of no longer pulling a
merge instance when sorting stored fields.
> SortingStoredFieldsConsumer should use a format that has better random-access
> -----------------------------------------------------------------------------
>
> Key: LUCENE-9510
> URL: https://issues.apache.org/jira/browse/LUCENE-9510
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Priority: Minor
> Time Spent: 10m
> Remaining Estimate: 0h
>
> We noticed some indexing rate regressions in Elasticsearch after upgrading to
> a new Lucene snapshot. This is due to the fact that
> SortingStoredFieldsConsumer is using the default codec to write stored fields
> on flush. Compression doesn't matter much for this case since these are
> temporary files that get removed on flush after the segment is sorted anyway
> so we could switch to a format that has faster random access.
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