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https://issues.apache.org/jira/browse/LUCENE-4995?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand updated LUCENE-4995:
---------------------------------

    Attachment: LUCENE-4995.patch

Here is a patch which only reuses the buffer when there is less than 32kb of 
data to decompress.
                
> 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: cpuGraph_4995Patch.jpg, heapGraph_4995Patch.jpg, 
> LUCENE-4995.patch, 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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