lucene-java-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Aigner, Thomas" <TAig...@WescoDist.com>
Subject RE: java on 64 bits
Date Fri, 21 Oct 2005 13:46:53 GMT
I have seen quite a few posts on using the 1.9 dev version for
production uses.  How stable is it? Is it really ready for production?
I would like to use it.. but I never ever put beta packages in
procution.. but then again.. I'm always dealing with Microsoft :)

Tom

-----Original Message-----
From: Yonik Seeley [mailto:yseeley@gmail.com] 
Sent: Friday, October 21, 2005 9:28 AM
To: java-user@lucene.apache.org
Subject: Re: java on 64 bits

1) make sure the failure was due to an OutOfMemory exception and not
something else.
2) if you have enough memory, increase the max JVM heap size (-Xmx)
3) if you don't need more than 1.5G or so of heap, use the 32 bit JVM
instead (depending on architecture, it can acutally be a little faster
because more references fit in the CPU cache).
4) see how many indexed fields you have and if you can consolidate any
of
them
4.5) if you don't have too many indexed fields, and have enough spare
file
descriptors, try using the non-compound file format instead.
5) run with the latest version of lucene (1.9 dev version) which may
have
better memory usage during optimizes & segment merges.
6) If/when optional norms
http://issues.apache.org/jira/browse/LUCENE-448
makes it into lucene, you can apply it to any indexed fields for which
you
don't need index-time boosting or length normalization.

As for getting rid of your current intermediate files, I'd rebuild from
scratch just to ensure things are OK.

-Yonik
Now hiring -- http://tinyurl.com/7m67g

On 10/21/05, Roxana Angheluta <roxana@attentio.com> wrote:
>
> Thank you, Yonik, it seems this is the case.
> What can we do in this case? Would running the program with java -d32
be
> a solution?
>
> Thanks again,
> roxana
> >One possibility: if lucene runs out of memory while adding or
optimizing,
> it
> >can leave unused files beind that increase the size of the index. A
64
> bit
> >JVM will require more memory than a 32 bit one due to the size of all
> >references being doubled.
> >
> >If you are using the compound file format (the default - check for
.cfs
> >files), then it's easy to check if you have this problem by seeing if
> there
> >are any *.f* files in the index directory. These are intermediate
files
> and
> >shouldn't exist for long in a compound-file index.
> >
> >-Yonik
> >Now hiring -- http://tinyurl.com/7m67g
>
>

---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-user-help@lucene.apache.org


Mime
View raw message