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From: Michael McCandless <lucene@mikemccandless.com>
Date: Thu, 27 Aug 2015 16:21:31 -0400
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 <CAL8Pwkb8L+rC=1fqjhUwaz==OM774TaMqNc0GdF02yPtZPXFTA@mail.gmail.com>
Subject: Re: Number of threads in index writer config?
To: Lucene Users <java-user@lucene.apache.org>
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Actually, the nightly Indexer.java (which tracks Lucene's trunk) did
set call IWC.setMaxThreadStates, up until we removed this setting
entirely in https://issues.apache.org/jira/browse/LUCENE-6659

So now (as of Lucene 5.3.0) IndexWriter lets you use as many threads
as you want.

Mike McCandless

http://blog.mikemccandless.com


On Thu, Aug 27, 2015 at 5:22 AM, Rob Audenaerde
<rob.audenaerde@gmail.com> wrote:
> Hi all,
>
> I was wondering about the number of threads to use for indexing.
>
> There is a setting: getMaxThreadStates() in the IndexWriterConfig that
> determines how many threads can write to the index  simultaneously.
>
> The luceneutil Indexer.java (that is used for the nightly benchmarks),
> seems to use the default value (8), while it uses 20 indexing threads.
>
> Is there a reason to not set the maxThreadStates to the number of indexing
> thread?
>
> Thanks!

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