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From "Martijn van Groningen (Commented) (JIRA)" <>
Subject [jira] [Commented] (LUCENE-3509) Add settings to IWC to optimize IDV indices for CPU or RAM respectivly
Date Sun, 23 Oct 2011 22:14:32 GMT


Martijn van Groningen commented on LUCENE-3509:

bq. 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.
Makes sense if you write it down like that :)

I think it should be an option inside DefaultDocValuesConsumer (since this creates the writer)
that defaults to true and if users want to change this behaviour they will need to change
their codec.
> Add settings to IWC to optimize IDV indices for CPU or RAM respectivly
> ----------------------------------------------------------------------
>                 Key: LUCENE-3509
>                 URL:
>             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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