[Neo] Dijkstra search on a big graph

Johan Svensson johan at neotechnology.com
Mon Feb 8 20:38:20 CET 2010


Hi Anton,

Sounds like you can reproduce this problem? If so I would definitely
like to have a look at it.

Btw, what JVM and Linux kernel version are you running?

-Johan

On Mon, Feb 8, 2010 at 3:59 PM, Anton Popov <popov.UA.work at gmail.com> wrote:
> 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
>
> --
> Best regards,
> Popov Anton


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