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https://issues.apache.org/jira/browse/SOLR-13512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16859179#comment-16859179
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Andrzej Bialecki commented on SOLR-13512:
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This is the output of {{Accountable.ramBytesUsed()}} which _should_ represent
how much heap a given Accountable consumes. Whether it's useful in case of
these low-level components remains to be seen - I suspect it does NOT represent
the amount of MMap-ed memory, just the POJOs that totally reside in heap.
Anyway, this section is not affected by this issue, look for the {{rawSize}}
section instead.
> Raw index data analysis tool
> ----------------------------
>
> Key: SOLR-13512
> URL: https://issues.apache.org/jira/browse/SOLR-13512
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Andrzej Bialecki
> Assignee: Andrzej Bialecki
> Priority: Major
> Fix For: master (9.0), 8.2
>
> Attachments: SOLR-13512.patch, SOLR-13512.patch, SOLR-13512.patch,
> SOLR-13512.patch, rawSizeDetails.json, rawSizeSummary.json
>
>
> A common question from Solr users is how to determine how a given schema
> field and all its related index data contributes to the total index size.
> It's possible to estimate this information by doing a single full pass
> through all index data, aggregating estimated sizes of terms, postings, doc
> values and stored fields. The totals represent of course the worst case
> scenario when there's no index compression at all, but still they should be
> useful for answering the questions above.
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