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https://issues.apache.org/jira/browse/LUCENE-4995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13655364#comment-13655364
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Adrien Grand commented on LUCENE-4995:
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bq. Are we sure this is the right thing to do?
I have no idea at all. On the one hand, it looks reasonable to me to have a
reusable per-thread buffer to handle decompression, but on the other hand, it
makes me unhappy that its size is unbounded: if an index has a few 1M documents
on S segments and T threads, the JVM will have to reserve S*T*1M of heap just
to be able to handle decompression.
> Remove the strong reference of CompressingStoredFieldsReader on the
> decompression buffer
> ----------------------------------------------------------------------------------------
>
> Key: LUCENE-4995
> URL: https://issues.apache.org/jira/browse/LUCENE-4995
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Attachments: LUCENE-4995.patch
>
>
> CompressingStoredFieldsReader has a strong reference on the buffer it uses
> for decompression. Although it makes the reader able to reuse this buffer,
> this can trigger high memory usage in case some documents are very large.
> Creating this buffer on demand would help give memory back to the JVM.
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