I am exploring the size limits for GNU Prolog
when used as a database. Right now I have
a prolog file that contains 10,000 simple facts.
It looks like this:
is_a_widget('GUID:Widget-0000000').
is_a_widget('GUID:Widget-0000001').
is_a_widget('GUID:Widget-0000002').
:
:
is_a_widget('GUID:Widget-0009995').
is_a_widget('GUID:Widget-0009996').
is_a_widget('GUID:Widget-0009997').
is_a_widget('GUID:Widget-0009998').
is_a_widget('GUID:Widget-0009999').
The GNU Prolog compiler chokes when trying to compile it.
xyzzy:Src kt$ gplc -o program blatz.pl
Fatal Error: global stack overflow (size: 32768 Kb, reached: 32765 Kb,
environment variable used: GLOBALSZ) compilation failed
Increasing the GLOBALSZ variable to 300MB doesn't help:
xyzzy:Src kt$ GLOBALSZ=327650; export GLOBALSZ; gplc -o program blatz.pl
Fatal Error: global stack overflow (size: 327652 Kb, reached: 327649 Kb,
environment variable used: GLOBALSZ) compilation failed
Is 10,000 facts a *REAL* limit? Or am I doing something very wrong? Ideally
I'd like to go to about 1,000,000 simple facts.
I created my input prolog file with this C program:
#include <stdio.h>
int main(int argc, char *argv[])
{
FILE *fp = fopen(argv[1], "w");
for (int i = 0; i < 10000; ++i)
{
fprintf(fp, "is_a_widget('GUID:Widget-%07d').\n", i);
}
fclose(fp);
return 0;
}
Thanks,
Mark Roulo
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