Well, it's "normal," but not necessarily desirable.
"save-facts" calls Rete.ppFacts() which actually just renders the fact
list as a big string. This is obviously not good. It's slow, and as
you note, consumes a lot of memory. Works fine for short fact lists,
though.
I will consider improving matters in the next release. For now, you
could write your own version save-facts. All you have to do is call
Rete.listFacts() to get an Enumeration of all facts, then simply write
the return value of toString() from each element of the Enumeration to
a file individually.
I think Gyhra, Norman (Student Assistant) wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
> Hello !
>
>
> Is it "normal" that (save-facts) seems to
> consume a huge amount of memory ?
>
> I use the NT task manager to watch the memory usage
> of my Jess program. It remains quite stable during the
> processing of rules. I tested with a 10 meg fact file
> that consumes about 50 megs of memory.
>
> However, as soons as I write my fact base into a
> file the usage jumps up to twice the value.
>
> As I want to use much larger fact bases later on,
> this behaviour might cause some serious memory problems.
>
> Any way to get around that?
> Thanks for any help.
>
> Jess 5.1
> Java 1.3
> P3-450
> 512 MB RAM
>
> Regards,
> Norman
>
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Ernest Friedman-Hill
Distributed Systems Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
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PO Box 969 http://herzberg.ca.sandia.gov
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