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Posted to issues@lucene.apache.org by "Tomoko Uchida (Jira)" <ji...@apache.org> on 2020/07/02 11:24:00 UTC
[jira] [Commented] (LUCENE-9286) FST arc.copyOf clones BitTables
and this can lead to excessive memory use
[ https://issues.apache.org/jira/browse/LUCENE-9286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17150197#comment-17150197 ]
Tomoko Uchida commented on LUCENE-9286:
---------------------------------------
For status update:
I noticed JapaneseAnalyzer perf test has been added (maybe yesterday?) to [https://home.apache.org/~mikemccand/lucenebench/analyzers.html], by the effort of the PR to luceneutil (thank you [~johtani] and [~mikemccand]!)
I hope this will be a great help for FST hackers as well as devs who are interested in JapaneseTokenizer.
> FST arc.copyOf clones BitTables and this can lead to excessive memory use
> -------------------------------------------------------------------------
>
> Key: LUCENE-9286
> URL: https://issues.apache.org/jira/browse/LUCENE-9286
> Project: Lucene - Core
> Issue Type: Bug
> Affects Versions: 8.5
> Reporter: Dawid Weiss
> Assignee: Bruno Roustant
> Priority: Major
> Fix For: 8.6
>
> Attachments: screen-[1].png
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> I see a dramatic increase in the amount of memory required for construction of (arguably large) automata. It currently OOMs with 8GB of memory consumed for bit tables. I am pretty sure this didn't require so much memory before (the automaton is ~50MB after construction).
> Something bad happened in between. Thoughts, [~broustant], [~sokolov]?
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