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From "Yonik Seeley" <>
Subject Re: performance feedback
Date Wed, 09 Jul 2008 16:06:22 GMT
On Wed, Jul 9, 2008 at 11:35 AM, Beard, Brian <> wrote:
> I will try tweaking RAM, and check about autoCommit=false. It's on the
> future agenda to multi-thread through the index writer. The indexing
> time I quoted includes the document creation time which would definitely
> improve with multi-threading.
> I'm doing batch updates of up to 1000 a pop, and closing and re-opening
> the IndexWriter in between.

autoCommit=false will definitely help, and there is normally no reason
not to use it.
Bigger batches (or a single batch) will also help indexing speed.  A
single IndexWriter session can now avoid copying stored fields on
segment merges.


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