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From "Shai Erera (JIRA)" <>
Subject [jira] [Updated] (LUCENE-4769) Add a CountingFacetsAggregator which reads ordinals from a cache
Date Tue, 12 Feb 2013 06:53:16 GMT


Shai Erera updated LUCENE-4769:

    Attachment: LUCENE-4769.patch

Added IntRollupFacetsAggregator which is an abstract FacetsAggregator that implements rollupValues
by summing the values from FacetArrays.getIntArray(). Moved the 3 counting aggregators (including
the one in this patch) to extend it and focus on implementing aggregate only.
> Add a CountingFacetsAggregator which reads ordinals from a cache
> ----------------------------------------------------------------
>                 Key: LUCENE-4769
>                 URL:
>             Project: Lucene - Core
>          Issue Type: New Feature
>          Components: modules/facet
>            Reporter: Shai Erera
>            Assignee: Shai Erera
>         Attachments: LUCENE-4769.patch, LUCENE-4769.patch
> Mike wrote a prototype of a FacetsCollector which reads ordinals from a CachedInts structure
on LUCENE-4609. I ported it to the new facets API, as a FacetsAggregator. I think we should
offer users the means to use such a cache, even if it consumes more RAM. Mike tests show that
this cache consumed x2 more RAM than if the DocValues were loaded into memory in their raw
form. Also, a PackedInts version of such cache took almost the same amount of RAM as straight
int[], but the gains were minor.
> I will post the patch shortly.

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