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From "Robert Petersen" <>
Subject RE: Do commits block updates in SOLR 1.4?
Date Fri, 03 Sep 2010 17:27:42 GMT
So you are saying we definitely do not need to pause ADD activity on other threads while we
send the COMMIT?  And the same goes with AUTOCOMMIT right?

We are using SOLR 1.4 now.  We were on 1.3 previously.  We pretty much just assumed pausing
ADDs during COMMITs was required by SOLR when we designed our indexing system, mostly due
to our experience with an older and different search engine.  

-----Original Message-----
From: Lance Norskog [] 
Sent: Thursday, September 02, 2010 6:10 PM
Subject: Re: Do commits block updates in SOLR 1.4?

Yes, indexing synchronized during commits. You can call commit all you
want, and index docs, and commit will finish and then indexing will
restart.  Previous Solr release did this also; how far back is your
existing Solr?

On Thu, Sep 2, 2010 at 1:11 PM, Robert Petersen <> wrote:
> Hello sorry to bother but does anyone know the answer to this?  This is
> the closest thing I can find on the subject:
> peedup-td498465.html
> -----Original Message-----
> From: Robert Petersen []
> Sent: Wednesday, September 01, 2010 11:35 AM
> To:
> Subject: Do commits block updates in SOLR 1.4?
> I can't seem to find a definitive answer.  I have ten threads doing my
> indexing and I block all the threads when one is ready to do a commit so
> no adds are done until the commit finishes.  Is this still required in
> SOLR 1.4 or could I take it out?  I tried testing this on a separate
> small index where I set autocommit in solrconfig and seem to have no
> issues just continuously adding documents from multiple threads to it
> despite its commit activity.  I'd like to do the same in my big main
> index, is it safe?
> Also, is there any difference in behavior between autocommits and
> explicit commits in this regard?

Lance Norskog
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