[jira] [Commented] (LUCENE-10573) Improve stored fields bulk merge for degenerate O(n^2) merges

["Robert Muir (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-10573?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17537437#comment-17537437 ] 

Robert Muir commented on LUCENE-10573:
--------------------------------------

Fix TieredMergePolicy, don't hack around its shortcomings in the stored fields, thats awful.

> Improve stored fields bulk merge for degenerate O(n^2) merges
> -------------------------------------------------------------
>
>                 Key: LUCENE-10573
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10573
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Priority: Minor
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Spin-off from LUCENE-10556.
> For small merges that are below the floor segment size, TieredMergePolicy may merge segments that have vastly different sizes, e.g. one 10k-docs segment with 9 100-docs segments. 
> While we might be able to improve TieredMergePolicy (LUCENE-10569), there are also improvements we could make to stored fields, such as bulk-copying chunks of the first segment until the first dirty chunk. In this scenario where segments keep being rewritten, this would help significantly.



--
This message was sent by Atlassian Jira
(v8.20.7#820007)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@lucene.apache.org
For additional commands, e-mail: issues-help@lucene.apache.org