Yes, you can change the mergeFactor.  More important than the mergeFactor is 
this:

<ramBufferSizeMB>32</ramBufferSizeMB>

Pump it up as much as your hardware/JVM allows.  And use appropriate -Xmx, of 
course.


Otis
--
Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch



----- Original Message ----
> From: "Barnett, Jeffrey" <[EMAIL PROTECTED]>
> To: "solr-user@lucene.apache.org" <solr-user@lucene.apache.org>
> Sent: Thursday, October 30, 2008 3:49:30 PM
> Subject: Changing mergeFactor in mid-stream?
> 
> The http://wiki.apache.org/lucene-java/ImproveIndexingSpeed page suggests 
> that 
> indexing will be sped up by using higher values of mergeFactor, while search 
> speed improves with lower values.  I need to create an index using multiple 
> batches of documents.  My question is, can I begin building with a high 
> mergeFactor for the bulk of the load and then switch to a lower value for the 
> final batch?  I build the indices offline, and only swap them to online when 
> complete.  The online index is never updated.

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