Re: [igraph] Memory error

[Gábor Csárdi]

Well, it is probably the computer running out of memory. My guess is
that you want to calculate shortest paths between many pairs of
vertices, and this needs a large matrix. E.g. if you do it for all
pairs of vertices, it needs about 2TB. (And you'll run into other
problems with such a big matrix, probably.)

To say more we would need to see what you are actually doing.

Gabor

On Mon, Jun 22, 2015 at 10:11 AM, Ronquillo, Edgar Nahum
<address@hidden> wrote:
> Hello all,
>
> I am working on generating the shortest path. I populate my graph using
> add_edges which works perfectly fine. However, once I use it with millions
> of vertices and edges I get a memory error, 1,347,910 vertices and
> 10,767,522 edges to be exact. I know it is not the computer running out of
> memory since I am monitoring the RAM usage as the code is running. I also
> know it is not the limit of python 32 bits of 2GB because it only get up to
> around 1 GB and I get the error. Is there some type of limit on igraph as to
> how many vertices or edges you can actually add? Any help would be greatly
> appreciated. By the way, here is the memory error I get.
>
>
>
> File "C:\Python27\lib\site-packages\igraph\__init__.py", line 243, in
> add_edges
>
>     return GraphBase.add_edges(self, es)
>
> MemoryError: Error at c:\dev\igraph\igraph-0.6.5-msvc\src\vector.pmt:439:
> cannot reserve space for vector, Out of memory
>
>
>
>
>
> Thanks
>
>
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