[Xapian-devel] Cleaning the index

[Richard Boulton]

The termlists in Xapian contain a list of all the terms in a given
document, so when a document is deleted these are used to update the
postlists for all the relevant terms to remove the document id. The posting
list lengths, etc, are all updated immediately (well, at the next commit).
 This contrasts with Lucene-style systems where the documents are just
marked as deleted and garbage collected later.

-- 
Richard


On 1 March 2014 19:31, Matt Chaput <matt at whoosh.ca> wrote:

> Just curious: How does Xapian clean up postings/words from deleted
> documents? Does it just remove them whenever a posting node is COWed in the
> Btree? Or is there some kind of periodic reaper function?
>
> Thanks!
>
> Matt
>
>
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