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From "Cabansag, Ronald-Alvin R" <>
Subject RE: lucene norms cached twice
Date Fri, 29 Oct 2010 21:38:51 GMT

Thanks for the input. We'll try this out.
And you're right - I tried to simplify our first operation's description.

Cengage Learning

-----Original Message-----
From: [] On Behalf Of Yonik Seeley
Sent: Friday, October 29, 2010 3:40 PM
Subject: Re: lucene norms cached twice

On Fri, Oct 29, 2010 at 3:32 PM, Cabansag, Ronald-Alvin R
<> wrote:
> We use a QueryWrapperFilter.getDocIdSet(indexReader) to get the DocIdSet and compute
the hit count using its iterator.

If you want to avoid double-caching of norms, then you should call
getDocIdSet() for each segment reader, not the top level reader.

Aside: presumably you're actually doing something more advanced than
getting the hit count (and you just simplified your description
because it wasn't pertinent)... since you can get the hit count from


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