[Neo] Dijkstra search on a big graph

Anton Popov popov.UA.work at gmail.com
Mon Feb 8 15:59:54 CET 2010


Hello Johan,

Thanks for your answer & see my answers below:

On 8 February 2010 11:15, Johan Svensson <johan at neotechnology.com> wrote:

> Hi,
>
> How large heap have you set? I see that you have allocated 3G for
> memory mapping that leaves about 512M max left for heap size since OS
> (and other on OS processes) needs some memory.
>

Yes, I've set 3G for memory mapping, but application allocated only 1.8G,
that leaves enough memory for OS, imho. Anyway, changing parameters of
property file 1G -> 500M (so max allocated memory should be 1.5G instead of
3G) changes nothing. I've got the same exceptions.


> I have not seen this stacktrace on Linux (used to happen a lot on
> 32-bit windows versions since the 2G continuous map limit really
> wasn't 2G).
>

I use 64-bit PC if this matters.

Try lower nodestore memory mapped settings (check how large file is,
> should not be 1GByte?) and see if that helps.
>

As described above - using any setting values has no influence on my app. To
be sure, I can say that small routes are found pretty fine, without any
exceptions.
What file you are talking about?


> Regards,
> -Johan
> _______________________________________________
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> User at lists.neo4j.org
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>



-- 
Best regards,
Popov Anton


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