[jira] Closed: (LUCENE-859) Expose the number of deleted docs in index/segment

["Otis Gospodnetic (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-859?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Otis Gospodnetic closed LUCENE-859.
-----------------------------------

       Resolution: Won't Fix
    Lucene Fields: [New, Patch Available]  (was: [Patch Available, New])

Doooooh, of course! numDocs() looks like this:

  public int numDocs() {
    int n = maxDoc();
    if (deletedDocs != null)
      n -= deletedDocs.count();
    return n;
  }

Won't Fix.

> Expose the number of deleted docs in index/segment
> --------------------------------------------------
>
>                 Key: LUCENE-859
>                 URL: https://issues.apache.org/jira/browse/LUCENE-859
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Index
>            Reporter: Otis Gospodnetic
>         Assigned To: Otis Gospodnetic
>            Priority: Minor
>         Attachments: LUCENE-859
>
>
> Use case:
> We've got a lot of large, mostly search-only indices. These indices are not re-optimized once "deployed".   Docs in them do not get updated, but they do get deleted.  After a while, the number of deleted docs grows, but it's hard to tell how many documents have been deleted.
> Exposing the number of deleted docs via *Reader.deletedDocs() method let's you get to this number.
> I'm attaching  patch that touches the following:
> M      src/test/org/apache/lucene/index/TestSegmentReader.java
> M      src/java/org/apache/lucene/index/MultiReader.java
> M      src/java/org/apache/lucene/index/IndexReader.java
> M      src/java/org/apache/lucene/index/FilterIndexReader.java
> M      src/java/org/apache/lucene/index/ParallelReader.java
> M      src/java/org/apache/lucene/index/SegmentReader.java
> SegmentReader also got a public static main(String[]) that takes 1 command-line parameter, a path to the index to check, and prints out the number of deleted docs.

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