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https://issues.apache.org/jira/browse/LUCENE-6106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14246538#comment-14246538
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ASF subversion and git services commented on LUCENE-6106:
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Commit 1645618 from [~jpountz] in branch 'dev/branches/branch_5x'
[ https://svn.apache.org/r1645618 ]
LUCENE-6106: Improve tracking of filter usage in LRUFilterCache.
> Improve FilterCachingPolicy statistics computation
> --------------------------------------------------
>
> Key: LUCENE-6106
> URL: https://issues.apache.org/jira/browse/LUCENE-6106
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-6106.patch
>
>
> Currently FilterCachingPolicy.onCache is supposed to be called every time
> that FilterCache.onCache is used. However, this does not necessarily reflect
> how much a filter is used. For instance you can call cache and not use the
> filter, or call cache once and then use it a hundred times. It would be more
> useful to know how many times a filter has been used on a top level reader,
> and I think we can do this by doing something like below in the caching
> wrapper filter?
> {code}
> @Override
> public DocIdSet getDocIdSet(LeafReaderContext context, Bits acceptDocs)
> throws IOException {
> if (context.ord == 0) {
> // increment counter
> }
> }
> {code}
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