I installed Alfresco 3.4 to test it with many documents. I loaded a few thousand documents to one space (folder) and tested searching. Everything looked OK. I load hundreds of thousand documents and I noticed, that there are documents which I can not find using advanced search (or lucene search in node browser) but I can find them using xpath query (in Admin panel, Node browser, using "select nodes"). I tried to find them using, for example: sys:node-dbid property. With advanced search or lucene sometimes it is not possible (document is not found), but with xpath and select nodes in node browser it is always possible.
Does lucene needs special configuration to search such amount of documents?