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https://issues.apache.org/jira/browse/LUCENE-3509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13133754#comment-13133754
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Robert Muir commented on LUCENE-3509:
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well the same applies to having an IndexDocValuesConfig.
If my implementation doesn't use packed integers, it doesnt make a lot of sense?
So I think it would be best if this was only a parameter to this particular
implementation... otherwise we end out with a ton of options across all
possible implementations, which won't make a lot of sense at all.
I think at the end of the day, we should imagine having tons of implementations
for the different index parts (look how many term dictionaries we have), and
let impls have their own parameters.
If someone wants to toggle these crazy parameters, thats something they can do
in their codec definition. For solr users etc, thats something they can tweak
in the xml on a per-implementation basis just like when they provide crazy
parameters to various tokenfilters in their analysis chain.
> Add settings to IWC to optimize IDV indices for CPU or RAM respectivly
> ----------------------------------------------------------------------
>
> Key: LUCENE-3509
> URL: https://issues.apache.org/jira/browse/LUCENE-3509
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/index
> Affects Versions: 4.0
> Reporter: Simon Willnauer
> Priority: Minor
> Fix For: 4.0
>
> Attachments: LUCENE-3509.patch
>
>
> spinnoff from LUCENE-3496 - we are seeing much better performance if required
> bits for PackedInts are rounded up to a 8/16/32/64. We should add this option
> to IWC and default to round up ie. more RAM & faster lookups.
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