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Posted to issues@lucene.apache.org by "Bruno Roustant (Jira)" <ji...@apache.org> on 2020/03/21 14:05:00 UTC
[jira] [Commented] (LUCENE-9286) FST construction explodes memory
in BitTable
[ https://issues.apache.org/jira/browse/LUCENE-9286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17063920#comment-17063920 ]
Bruno Roustant commented on LUCENE-9286:
----------------------------------------
We expect to not take more memory than before, some tests verify that in some cases.
[~dweiss] would you have a test to reproduce?
I'd like to debug that, but I'll need an idea of the data used to build the FST.
Another option could be that I share some code that add traces so that you can run it and provide those stats.
> FST construction explodes memory in BitTable
> --------------------------------------------
>
> 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: Dawid Weiss
> Priority: Major
> Attachments: screen-[1].png
>
>
> 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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