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https://issues.apache.org/jira/browse/LUCENE-8635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16740932#comment-16740932
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Erick Erickson commented on LUCENE-8635:
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Ankit:
The autoscaling tests are have been failing intermittently for a while. If you
can run those tests independently and have them succeed I wouldn't worry about
them.
"run those tests independently" in this case is just executing the "reproduce
with" line, just cut/paste. e.g.
ant test -Dtestcase=ScheduledMaintenanceTriggerTest
-Dtests.method=testInactiveShardCleanup -Dtests.seed=1D3ADDF6AE377902
-Dtests.slow=true -Dtests.badapples=true -Dtests.locale=ha
-Dtests.timezone=America/Nome -Dtests.asserts=true
-Dtests.file.encoding=US-ASCII
Best,
Erick
> Lazy loading Lucene FST offheap using mmap
> ------------------------------------------
>
> Key: LUCENE-8635
> URL: https://issues.apache.org/jira/browse/LUCENE-8635
> Project: Lucene - Core
> Issue Type: New Feature
> Components: core/FSTs
> Environment: I used below setup for es_rally tests:
> single node i3.xlarge running ES 6.5
> es_rally was running on another i3.xlarge instance
> Reporter: Ankit Jain
> Priority: Major
> Attachments: offheap.patch, rally_benchmark.xlsx
>
>
> Currently, FST loads all the terms into heap memory during index open. This
> causes frequent JVM OOM issues if the term size gets big. A better way of
> doing this will be to lazily load FST using mmap. That ensures only the
> required terms get loaded into memory.
>
> Lucene can expose API for providing list of fields to load terms offheap. I'm
> planning to take following approach for this:
> # Add a boolean property fstOffHeap in FieldInfo
> # Pass list of offheap fields to lucene during index open (ALL can be
> special keyword for loading ALL fields offheap)
> # Initialize the fstOffHeap property during lucene index open
> # FieldReader invokes default FST constructor or OffHeap constructor based
> on fstOffHeap field
>
> I created a patch (that loads all fields offheap), did some benchmarks using
> es_rally and results look good.
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