There are two methods to retrieve the size of an index in
Zend_Search_Lucene.
Zend_Search_Lucene::maxDoc() returns one greater than the
largest possible document number. It's actually the overall number of the documents in
the index including deleted documents, so it has a synonym:
Zend_Search_Lucene::count().
Zend_Search_Lucene::numDocs() returns the total number of
non-deleted documents.
<?php
$indexSize = $index->count();
$documents = $index->numDocs();
Zend_Search_Lucene::isDeleted($id) method may be used to check
if a document is deleted.
<?php
for ($count = 0; $count < $index->maxDoc(); $count++) {
if ($index->isDeleted($count)) {
echo "Document #$id is deleted.\n";
}
}
Index optimization removes deleted documents and squeezes documents' IDs in to a smaller range. A document's internal id may therefore change during index optimization.