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From "Baldwin, David" <David_Bald...@bmc.com>
Subject RE: best choice for ramBufferSizeMB
Date Fri, 16 May 2014 15:24:54 GMT
Is this true as well for 2.9.2?

-----Original Message-----
From: Michael McCandless [mailto:lucene@mikemccandless.com] 
Sent: Wednesday, May 14, 2014 8:54 AM
To: Lucene Users
Subject: Re: best choice for ramBufferSizeMB

Generally larger is better, as long as JVM's heap is big enough to allow IW to use that RAM.

Large flushed segments means less merging later ...

Mike McCandless

http://blog.mikemccandless.com


On Wed, May 14, 2014 at 9:33 AM, Gudrun Siedersleben <Siedersleben@mpdl.mpg.de> wrote:
> Hi all,
>
> we want to speed up building our lucene index.  We set ramBufferSize to some values between
32 and 128 MB, but that does not make any difference concerning the time used for reindexing.
We did not set maxBufferedDocs, .. which could conflict.
> We start the JVM with the following JAVA_OPTS:
>
> -Xms128m -Xmx512m -XX:MaxPermSize=256m
>
> What is the recommended value for ramBufferSizeMB depending on JAVA_OPTS and perhaps
other lucene parameters set? We use Lucene 3.6.0.
>
> Best regards
>
> Gudrun
>
>

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