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https://issues.apache.org/jira/browse/LUCENE-5095?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13701578#comment-13701578
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Adrien Grand commented on LUCENE-5095:
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Actually, I would love if we exposed this kind of information in a structured
way: not just a toString() method but rather something like optional methods
returning -1 by default that could be used by people implementing formats to
report on the disk and memory size used by their format. It is very common that
users wonder about what is eating their disk or memory capacity and I feel like
such monitoring methods would be very useful.
> Add useful toString()s to DocValues impls
> -----------------------------------------
>
> Key: LUCENE-5095
> URL: https://issues.apache.org/jira/browse/LUCENE-5095
> Project: Lucene - Core
> Issue Type: Task
> Reporter: Robert Muir
>
> Currently, you have no insight into what these are doing (what kind of
> compression does your numerics have, how much RAM are the datastructures
> taking up, so on.
> So I think we should add some cheap toString's (nothing heavy), things like
> {code}
> @Override
> public String toString() {
> return "Lucene42Numeric(compression=TABLE,bpv=" + bitsPerValue)";
> }
> {code}
> and so on. Maybe we could think about printing them from CheckIndex when
> verbose=true too.
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