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https://issues.apache.org/jira/browse/LUCENE-8749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16811802#comment-16811802
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Atri Sharma commented on LUCENE-8749:
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Agreed, a better IndexSearcher#slices implementation would definitely help.
However, I believe that the ability to customize the method through an external
object allows a user more granular control over the slice allocation algorithm.
Two users might have wildly different parameters on which they want to allocate
slices, so drawing a best fit algorithm for both of them might be hard.
I believe that having both the functionalities is a good idea. I am happy to
open another Jira for tracking efforts on a better default slice allocation
algorithm.
Thoughts?
> Proposal: Pluggable Interface for Slice Allocation Algorithm
> ------------------------------------------------------------
>
> Key: LUCENE-8749
> URL: https://issues.apache.org/jira/browse/LUCENE-8749
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/search
> Reporter: Atri Sharma
> Priority: Major
>
> The slice allocation method allocates one thread per segment today. If a user
> wishes to use a different slice allocation algorithm, there is no way except
> to make a change in IndexSearcher. This Jira proposes an interface to
> decouple the slice allocation mechanism from IndexSearcher and allow plugging
> in the method from an external factory (like Collectors).
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