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https://issues.apache.org/jira/browse/LUCENE-6199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14342197#comment-14342197
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Robert Muir commented on LUCENE-6199:
-------------------------------------
{quote}
This change is really small and does make a big difference on per-field RAM
usage.
{quote}
I don't think it does? If i have an index with say, 10 fields. How much will
this patch save me?
> Reduce per-field heap usage for indexed fields
> ----------------------------------------------
>
> Key: LUCENE-6199
> URL: https://issues.apache.org/jira/browse/LUCENE-6199
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: Trunk, 5.1
>
> Attachments: LUCENE-6199.patch, LUCENE-6199.patch
>
>
> Lucene uses a non-trivial baseline bytes of heap for each indexed
> field, and I know it's abusive for an app to create 100K indexed
> fields but I still think we can and should make some effort to reduce
> heap usage per unique field?
> E.g. in block tree we store 3 BytesRefs per field, when 3 byte[]s
> would do...
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