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https://issues.apache.org/jira/browse/LUCENE-10564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17536333#comment-17536333
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ASF subversion and git services commented on LUCENE-10564:
----------------------------------------------------------

Commit 802f5422c0f68d16f3991d59ffa3c6973716d24f in lucene's branch 
refs/heads/main from Julie Tibshirani
[ https://gitbox.apache.org/repos/asf?p=lucene.git;h=802f5422c0f ]

Add CHANGES entry for LUCENE-10564


> SparseFixedBitSet#or doesn't update memory accounting
> -----------------------------------------------------
>
>                 Key: LUCENE-10564
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10564
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Julie Tibshirani
>            Priority: Minor
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> While debugging why a cache was using way more memory than expected, one of 
> my colleagues noticed that {{SparseFixedBitSet#or}} doesn't update 
> {{{}ramBytesUsed{}}}. Here's a unit test that demonstrates this:
> {code:java}
>   public void testRamBytesUsed() throws IOException {
>     BitSet bitSet = new SparseFixedBitSet(1000);
>     long initialBytesUsed = bitSet.ramBytesUsed();
>     DocIdSetIterator disi = DocIdSetIterator.all(1000);
>     bitSet.or(disi);
>     assertTrue(bitSet.ramBytesUsed() > initialBytesUsed);
>   }
> {code}
> It also looks like we don't have any tests for {{SparseFixedBitSet}} memory 
> accounting (unless I've missed them!) It'd be nice to add more coverage there 
> too.



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